How to change node js s console font color

Question

I had to change the console background color to white because of eye problems  but the font is gray colored and it makes the messages unreadable  How can I change it

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I overloaded the console methods   var colors   Reset    x1b 0m   Red    x1b 31m   Green    x1b 32m   Yellow    x1b 33m      var infoLog   console info  var logLog   console log  var errorLog   console error  var warnLog   console warn   console info  function args        var copyArgs   Array prototype slice call arguments       copyArgs unshift colors Green       copyArgs push colors Reset       infoLog apply null copyArgs       console warn  function args        var copyArgs   Array prototype slice call arguments       copyArgs unshift colors Yellow       copyArgs push colors Reset       warnLog apply null copyArgs      console error  function args        var copyArgs   Array prototype slice call arguments       copyArgs unshift colors Red       copyArgs push colors Reset       errorLog apply null copyArgs          examples console info  Numeros  1 2 3   console warn  pares  2 4 6   console error  reiniciandooo      The output is

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For a popular alternative to colors that doesn t mess with the built-in methods of the String object  I recommend checking out cli-color   Includes both colors and chainable styles such as bold  italic  and underline   For a comparison of various modules in this category  see here

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I found this answer above  https   stackoverflow com a 41407246 4808079  very useful  but incomplete   If you only ever wanted to color something once  I guess it d be fine  but I think sharing it in a runnable functional form is much more applicable to real life use cases   const Color       Reset    x1b 0m     Bright    x1b 1m     Dim    x1b 2m     Underscore    x1b 4m     Blink    x1b 5m     Reverse    x1b 7m     Hidden    x1b 8m      FgBlack    x1b 30m     FgRed    x1b 31m     FgGreen    x1b 32m     FgYellow    x1b 33m     FgBlue    x1b 34m     FgMagenta    x1b 35m     FgCyan    x1b 36m     FgWhite    x1b 37m      BgBlack    x1b 40m     BgRed    x1b 41m     BgGreen    x1b 42m     BgYellow    x1b 43m     BgBlue    x1b 44m     BgMagenta    x1b 45m     BgCyan    x1b 46m     BgWhite    x1b 47m     function colorString color  string      return    color   string   Color Reset       function colorStringLog color  string      console log colorString color  string        Use it like this   colorStringLog Color FgYellow   Some Yellow text to console log     console log     colorString Color FgRed   red      colorString Color FgGreen   green      colorString Color FgBlue   blue      join

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Per this documentation  you can change the colors based on the data type of the output      you ll need the util module var util   require  util        let s look at the defaults   util inspect styles    special   cyan     number   yellow     boolean   yellow     undefined   grey     null   bold     string   green     date   magenta     regexp   red        what are the predefined colors  util inspect colors    bold    1  22      italic    3  23      underline    4  24      inverse    7  27      white    37  39      grey    90  39      black    30  39      blue    34  39      cyan    36  39      green    32  39      magenta    35  39      red    31  39      yellow    33  39       These appear to be ANSI SGR escape codes  where the first number is the code to emit before the output  and the second number is the code to emit after   So if we look at the chart of ANSI SGR codes on Wikipedia  you ll see that most of these start with a number 30-37 to set the foreground color  and end in 39 to reset to the default foreground color   So one thing I don t like is how dark some of these are   Especially dates   Go ahead and try new Date   in the console   Dark magenta on black is really hard to read   Let s change that to a light magenta instead      first define a new color util inspect colors lightmagenta    95 39       now assign it to the output for date types util inspect styles date    lightmagenta     Now when you try new Date    the output is much more readable   If you d like to set colors automatically when launching node  create a script that launches the repl  like this      set your colors however desired var util   require  util    util inspect colors lightmagenta    95 39   util inspect styles date    lightmagenta       start the repl     require  repl   start        Save this file  for example  init js   then run node exe init js   It will set the colors and launch the node js command prompt    Thanks to loganfsmyth in this answer for the repl idea

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to color your output You can use examples from there  https   help ubuntu com community CustomizingBashPrompt   Also a Gist for nodeJs  For example if you want part of the text in red color  just do console log with     033 31m this will be red  033 91m and this will be normal    Based on that I ve created  colog  extension for Node js  You can install it using   npm install colog   Repo and npm  https   github com dariuszp colog

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I really liked  Daniel s answer  but the console log color  functions didn t work the same way as regular console log  I have made a few changes  and now all parameters to the new functions will be passed to console log  as well as the color codes    const  colors         Reset     x1b 0m       Bright     x1b 1m       Dim     x1b 2m       Underscore     x1b 4m       Blink     x1b 5m       Reverse     x1b 7m       Hidden     x1b 8m        FgBlack     x1b 30m       FgRed     x1b 31m       FgGreen     x1b 32m       FgYellow     x1b 33m       FgBlue     x1b 34m       FgMagenta     x1b 35m       FgCyan     x1b 36m       FgWhite     x1b 37m        BgBlack     x1b 40m       BgRed     x1b 41m       BgGreen     x1b 42m       BgYellow     x1b 43m       BgBlue     x1b 44m       BgMagenta     x1b 45m       BgCyan     x1b 46m       BgWhite     x1b 47m       const enableColorLogging   function        Object keys  colors  forEach key   gt            console  log    key    function                return console log  colors key      arguments   colors Reset

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A handy one-liner I wrote for npm scripts that can t have dependencies   x000D   x000D  const   r  g  b  w  c  m  y  k           r   1     g   2     b   4     w   7       c   6     m   5     y   3     k   0     reduce  cols  col    gt          cols    col 0    f   gt    x1b 3  col 1  m  f  x1b 0m           console log    g  I    love   r  Italy      x000D   x000D   x000D   r g b w c m y k stands for red  green  blue  white  cyan  magenta  yellow and black

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var to rgb   function   text   r   g   b        return   x1b 38 2      r          g          b    m     text     x1b 0m        This code help set foreground color   x1b 38 2 R G Bm  This may not work some places

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Reset    x1b 0m  Bright    x1b 1m  Dim    x1b 2m  Underscore    x1b 4m  Blink    x1b 5m  Reverse    x1b 7m  Hidden    x1b 8m   FgBlack    x1b 30m  FgRed    x1b 31m  FgGreen    x1b 32m  FgYellow    x1b 33m  FgBlue    x1b 34m  FgMagenta    x1b 35m  FgCyan    x1b 36m  FgWhite    x1b 37m   BgBlack    x1b 40m  BgRed    x1b 41m  BgGreen    x1b 42m  BgYellow    x1b 43m  BgBlue    x1b 44m  BgMagenta    x1b 45m  BgCyan    x1b 46m  BgWhite    x1b 47m    For example if you want to have a Dim  Red text with Blue background you can do it in Javascript like this   console log   x1b 2m     x1b 31m     x1b 44m    Sample Text     x1b 0m      The order of the colors and effects seems to not be that important but always remember to reset the colors and effects at the end

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There are multiple packages available for formatting console text in Node js  The most popular are   chalk 15k stars colors 2 9k stars cli-color 500 stars  Usage  CHALK  const chalk   require  chalk    console log chalk red  Text in red       COLORS  const colors   require  colors    console log  Text in red  red     CLI-COLOR  const clc   require  cli-color    console log clc red  Text in red       Many people have noted their disapproval of colors altering the String prototype  If you prefer your prototypes to be left alone  use the following code instead  const colors   require  colors safe    console log colors red  Text in red

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This is a list of available colours  both background and foreground  in the console with some available actions  like reset  reverse  etc   const colours         reset   quot  x1b 0m quot       bright   quot  x1b 1m quot       dim   quot  x1b 2m quot       underscore   quot  x1b 4m quot       blink   quot  x1b 5m quot       reverse   quot  x1b 7m quot       hidden   quot  x1b 8m quot            fg            black   quot  x1b 30m quot           red   quot  x1b 31m quot           green   quot  x1b 32m quot           yellow   quot  x1b 33m quot           blue   quot  x1b 34m quot           magenta   quot  x1b 35m quot           cyan   quot  x1b 36m quot           white   quot  x1b 37m quot           crimson   quot  x1b 38m quot     Scarlet            bg            black   quot  x1b 40m quot           red   quot  x1b 41m quot           green   quot  x1b 42m quot           yellow   quot  x1b 43m quot           blue   quot  x1b 44m quot           magenta   quot  x1b 45m quot           cyan   quot  x1b 46m quot           white   quot  x1b 47m quot           crimson   quot  x1b 48m quot            Here s an example of how to use it  console log colours bg blue  colours fg white   quot I am a white message with a blue background quot   colours reset        Make sure that you don t forget  quot colours reset quot  at the so that you can reset the console back to it s original colours   Or you can install some utility modules  npm install console-info console-warn console-error --save-dev  These modules will show something like the following to the console when you use them

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This somewhat depends on what platform you are on  The most common way   to do this is by printing ANSI escape sequences  For a simple example    here s some python code from the blender build scripts       This is a object for use ANSI escape to color the text in the terminal const bColors         HEADER        033 95m       OKBLUE        033 94m       OKGREEN       033 92m       WARNING       033 93m       FAIL          033 91m       ENDC          033 0m        BOLD          033 1m          UNDERLINE     033 4m         To use code like this  you can do something like   console log    bColors WARNING  My name is sami   bColors ENDC

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If you want to change the colors directly yourself without a module try  console log   x1b 36m    sometext     x1b 0m      First  x1b 36m to change the colors to 36 and then back to terminal color 0     Here s a list of ANSI color codes

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This works for the  I know of  Node console  The package is shortcuts  and you can install it with this command  const short   require   testgrandma shortcuts    There is two commands you can do to change the color  It s RGB color and Hex color short colorRGB r g b   short colorhex hex   You can do console log short colorhex  d50000      This is red     The package can be found here  https   www npmjs com package  testgrandma shortcuts

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There are two ways to look at changing colors for a Node js console today   One is through general-purpose libraries that can decorate a text string with color tags  which you then output through the standard console log   The top libraries for that today    chalk colors cli-color   And the other way - patching the existing console methods  One such library - manakin lets you automatically set standard colors for all your console methods  log  warn  error and info    One significant difference from the generic color libraries - it can set colors either globally or locally  while keeping consistent syntax and output format for every Node js console method  which you then use without having to specify the colors  as they are all set automatically      I had to change the console background color to white because of eye problems  but the font is gray colored and it makes the messages unreadable  How can I change it    Specifically for your problem  here s the simplest solution   var con   require  manakin   global  con log color   30     Use black color for console log   It will set black color for every console log call in your application  See more color codes   Default colors as used by manakin

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I don t want any dependency for this and only these worked for me on OS X  All other samples from answers here gave me Octal literal errors   Reset     x1b 0m  Bright     x1b 1m  Dim     x1b 2m  Underscore     x1b 4m  Blink     x1b 5m  Reverse     x1b 7m  Hidden     x1b 8m   FgBlack     x1b 30m  FgRed     x1b 31m  FgGreen     x1b 32m  FgYellow     x1b 33m  FgBlue     x1b 34m  FgMagenta     x1b 35m  FgCyan     x1b 36m  FgWhite     x1b 37m   BgBlack     x1b 40m  BgRed     x1b 41m  BgGreen     x1b 42m  BgYellow     x1b 43m  BgBlue     x1b 44m  BgMagenta     x1b 45m  BgCyan     x1b 46m  BgWhite     x1b 47m    source  https   coderwall com p yphywg printing-colorful-text-in-terminal-when-run-node-js-script

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Came across this question  and wanted to use some colors on stdout without any dependencies  This combines some of the other great answers here   Here s what I ve got   Requires node v4 or greater      colors js const util   require  util    function colorize  color  text      const codes   util inspect colors color    return   x1b   codes 0  m  text  x1b   codes 1  m     function colors        let returnValue        Object keys util inspect colors  forEach  color    gt        returnValue color     text    gt  colorize color  text         return returnValue    module exports   colors     Just require the file  then use it like so   const colors   require    colors   console log colors green  I m green       The predefinied color codes are available here

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2017   Simple way  adding time color to the message  you don t need to change your code  use keep your console log  msg   or console err  error    var clc   require  cli-color    var mapping       log  clc blue    warn  clc yellow    error  clc red       log    warn    error   forEach function method      var oldMethod   console method  bind console     console method    function         oldMethod apply        console         mapping method  new Date   toISOString            concat arguments

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Emoji You can use colors for text as others mentioned in their answers  But you can use emojis instead  for example  you can use   for warning messages and  for error messages  Or simply use these notebooks as a color    error message   warning message   ok status message   action message   canceled status message   Or anything you like and want to recognize immediately by color   Bonus  This method also helps you to quickly scan and find logs directly in the source code  But Linux default emoji font is not colorful by default and you may want to make them colorful  first

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You can also use colorworks   Usage   var cw   require  colorworks   create    console info cw compile    red Red message with a   yellow yellow   word          To make life easier  you can also make a function with it   function say msg      console info cw compile msg        Now you can do   say    yellow Time spent    green   time   ms

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If you are using Windows CMD then go to the terminal Properties Colors  CMD top left  and then redefine the RGB value of the offensive color  In my case I believe it s the fifth color square from the left  which I changed to  222 222 222   It does not matter if the currently selected radio button shows Screen Text or Screen Background as you just redefine that specific  system  color  Once you changed the color don t forget to select back the preferred color for the background or text before clicking OK   After the change all these reddish messages from Node  Ember in my case  are clearly visible

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logger index js  const colors         Reset     x1b 0m       Bright     x1b 1m       Dim     x1b 2m       Underscore     x1b 4m       Blink     x1b 5m       Reverse     x1b 7m       Hidden     x1b 8m        FgBlack     x1b 30m       FgRed     x1b 31m       FgGreen     x1b 32m       FgYellow     x1b 33m       FgBlue     x1b 34m       FgMagenta     x1b 35m       FgCyan     x1b 36m       FgWhite     x1b 37m        BgBlack     x1b 40m       BgRed     x1b 41m       BgGreen     x1b 42m       BgYellow     x1b 43m       BgBlue     x1b 44m       BgMagenta     x1b 45m       BgCyan     x1b 46m       BgWhite     x1b 47m       module exports        gt        Object keys colors  forEach key   gt            console  log    key     strg    gt                if typeof strg      object   strg   JSON stringify strg  null  4               return console log colors key  strg   x1b 0m                          app js  require    logger        Then use it like   console logBgGreen   gr  ner Hintergrund

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node-colorify  Provides functions to print texts in color and also to do text formatting such as bold  blink  etc

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I ve made a file in my snippets directory called styles js  and I think it might help anybody who wants to import a single file  It s a small modification to the styles js file of color js and has helped me a lot  Here s the file s contents     Original  https   github com Marak colors js blob master lib styles js  const styleCodes            Reset all styles      reset   0  0               Text styles      bold   1  22       dim   2  22       italic   3  23       underline   4  24       inverse   7  27       hidden   8  28       strikethrough   9  29               Foregound classic colours      fgBlack   30  39       fgRed   31  39       fgGreen   32  39       fgYellow   33  39       fgBlue   34  39       fgMagenta   35  39       fgCyan   36  39       fgWhite   37  39       fgGray   90  39               Foreground bright colours      fgBrightRed   91  39       fgBrightGreen   92  39       fgBrightYellow   93  39       fgBrightBlue   94  39       fgBrightMagenta   95  39       fgBrightCyan   96  39       fgBrightWhite   97  39           Background basic colours      bgBlack   40  49       bgRed   41  49       bgGreen   42  49       bgYellow   43  49       bgBlue   44  49       bgMagenta   45  49       bgCyan   46  49       bgWhite   47  49       bgGray   100  49       bgGrey   100  49               Background bright colours      bgBrightRed   101  49       bgBrightGreen   102  49       bgBrightYellow   103  49       bgBrightBlue   104  49       bgBrightMagenta   105  49       bgBrightCyan   106  49       bgBrightWhite   107  49          This object will contain the string representation for all style codes  const styles           Loop over all the style codes and assign them to the  styles  object         The a  styleCode  in the  styleCodes  object consists of two numbers     Index 0  The opening style code  In HTML this can be the opening  lt b gt  tag      Index 1  The closing style code  In HTML this can be the closing  lt  b gt  tag   for  let styleCode of Object keys styleCodes         styles styleCode              open    x1B   styleCodes styleCode  0  m           close    x1B   styleCodes styleCode  1  m             module exports   styles   It s actually quite simple to use  const styles   require  quot  path to styles js quot        Let s say we ve got an error  const errorOpen   styles bold open   styles bgRed open   styles fgWhite open  const errorClose   styles reset close     Close everything console log errorOpen   quot ERROR quot   errorClose   quot   Missing semicolon at line 9  quot

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This is an approach for Windows 10  maybe for 7  and it changes the color scheme  theme  for cmd  npm terminal itself  not only console output for a particular app    I found the working Windows plugin - Color Tool  which is presumably developed under Windows umbrella  A description is available at the link    I added colortool directory into system environment path variable and now it is available whenever I start terminal  NodeJs command prompt  cmd

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No libraries no complications just simple   console log red  Error       function red s        return   033 31m    s

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This library by Sindre Sorhus is the best at the moment   chalk   Highly performant Doesn t extend String prototype Expressive API Ability to nest styles Clean and focused Auto-detects color support Actively maintained Used by 5500  modules

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paint-console  Simple colorable log  Support inspect objects and single line update This package just repaint console   install  npm install paint-console   usage  require  paint-console     console info  console info       console warn  console warn       console error  console error       console log  console log         demo

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var colorSet         Reset    x1b 0m       Red    x1b 31m       Green    x1b 32m       Yellow    x1b 33m       Blue    x1b 34m       Magenta    x1b 35m      var funcNames     info    log    warn    error    var colors    colorSet Green  colorSet Blue  colorSet Yellow  colorSet Red    for  var i   0  i  lt  funcNames length  i          let funcName   funcNames i       let color   colors i       let oldFunc   console funcName       console funcName    function              var args   Array prototype slice call arguments           if  args length                args    color   args 0   concat args slice 1   colorSet Reset                     oldFunc apply null  args                Test  console info  Info is green     console log  Log is blue     console warn  Warn is orange     console error  Error is red     console info  --------------------    console info  Formatting works as well  The number    d   123

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Coolors It s pretty good for use or extend  You can use simply  var coolors   require  coolors    console log coolors  My cool console log    red      Or with config  var coolors   require  coolors    console log coolors  My cool console log        text   yellow      background   red      bold  true     underline  true     inverse  true     strikethrough  true       And seems really funny to extend  var coolors   require  coolors    function rainbowLog msg       var colorsText   coolors availableStyles   text      var rainbowColors   colorsText splice 3       var lengthRainbowColors   rainbowColors length      var msgInLetters   msg split          var rainbowEndText           var i   0      msgInLetters forEach function letter           if letter                      if i     lengthRainbowColors  i   0              rainbowEndText    coolors letter  rainbowColors i                i             else              rainbowEndText                               return rainbowEndText    coolors addPlugin  rainbow   rainbowLog   console log coolorsExtended  This its a creative example extending core with a cool rainbown style    rainbown      View Coolors module

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In ubuntu you can simply use color codes    var sys   require  sys    process stdout write  x1B 31m    your message in red     x1B 0m r n

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Below you can find colors reference of text to command when running node js application   console log   x1b 36m s x1b 0m    I am cyan       cyan console log   x1b 33m s x1b 0m   stringToMakeYellow      yellow   Note  s is where in the string  the second argument  gets injected   x1b 0m resets the terminal color so it doesn t continue to be the chosen color anymore after this point   Colors reference  Reset     x1b 0m  Bright     x1b 1m  Dim     x1b 2m  Underscore     x1b 4m  Blink     x1b 5m  Reverse     x1b 7m  Hidden     x1b 8m   FgBlack     x1b 30m  FgRed     x1b 31m  FgGreen     x1b 32m  FgYellow     x1b 33m  FgBlue     x1b 34m  FgMagenta     x1b 35m  FgCyan     x1b 36m  FgWhite     x1b 37m   BgBlack     x1b 40m  BgRed     x1b 41m  BgGreen     x1b 42m  BgYellow     x1b 43m  BgBlue     x1b 44m  BgMagenta     x1b 45m  BgCyan     x1b 46m  BgWhite     x1b 47m    EDIT   For example   x1b 31m is an escape sequence that will be intercepted by your terminal and instructs it to switch to the red color  In fact   x1b is the code for the non-printable control character escape  Escape sequences dealing only with colors and styles are also known as ANSI escape code and are standardized  so therefore they  should  work on any platform   Wikipedia has a nice comparison of how different terminals display colors  https   en wikipedia org wiki ANSI escape code Colors

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I created my own module  StyleMe  I made it so I can do much with little typing  Example   var StyleMe   require  styleme    StyleMe extend      extend the string prototype  console log  gre Hello  blu world    styleMe       Logs hello world  with  hello  being green  and  world  being blue with     being normal    It can also be nested   console log  This is normal red this is red blu this is blue  back to red   styleMe      Or  if you dont want to extend the string prototype  you can just any of the 3 other options   console log styleme red  a string    console log  Hello  this is yellow text  yellow   end    console log styleme style  some text   red bbl

[node.js] How to change node.js's console font color?

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