I'm obviously missing something stupidly simple here. I have images with a white background so I want to be able to edit the arrows on the Bootstraps Carousel so they are visible. So many changing the color of the arrows (NOT the background like I've done).
CSS
.carousel-control-prev-icon, .carousel-control-next-icon {
height: 100px;
width: 100px;
outline: black;
background-color: rgba(0, 0, 0, 0.3);
background-size: 100%, 100%;
border-radius: 50%;
border: 1px solid black;
}
Carousel HTML
<div class = 'col-md-9'>
<div id="carouselExampleIndicators" class="carousel slide" data-ride="carousel">
<ol class="carousel-indicators">
<li data-target="#carouselExampleIndicators" data-slide-to="0" class="active"></li>
<li data-target="#carouselExampleIndicators" data-slide-to="1"></li>
<li data-target="#carouselExampleIndicators" data-slide-to="2"></li>
</ol>
<div class="carousel-inner" role="listbox">
<div class="carousel-item active">
<img class="d-block img-fluid" src="carousel/Bars%20and%20Dots.jpg" alt="First slide" class = 'img-responsive'>
</div>
<div class="carousel-item">
<img class="d-block img-fluid" src="carousel/murial.jpg" alt="Second slide" class = 'img-responsive'>
</div>
<div class="carousel-item">
<img class="d-block img-fluid" src="carousel/Upper%20Partialism%20album%20covers004white.jpg" alt="Third slide" class = 'img-responsive'>
</div>
</div>
<a class="carousel-control-prev" href="#carouselExampleIndicators" role="button" data-slide="prev">
<span class="carousel-control-prev-icon" aria-hidden="true"></span>
<span class="sr-only">Previous</span>
</a>
<a class="carousel-control-next" href="#carouselExampleIndicators" role="button" data-slide="next">
<span class="carousel-control-next-icon" aria-hidden="true"></span>
<span class="sr-only">Next</span>
</a>
</div>
</div>
This question is related to
html
css
twitter-bootstrap
bootstrap-4
carousel
The answer is
In bootstrap 4 if you are just changing the colour of the controls you can use the sass variables, typically in custom.scss:
$carousel-control-color: #7b277d;
As highlighted in this github issue note: https://github.com/twbs/bootstrap/issues/21985#issuecomment-281402443
Currently Bootstrap 4 uses a background-image with embbed SVG data info that include the color of the SVG shape. Something like:
.carousel-control-prev-icon { background-image:url("data:image/svg+xml;charset=utf8,%3Csvg xmlns='http://www.w3.org/2000/svg' fill='%23fff' viewBox='0 0 8 8'%3E%3Cpath d='M5.25 0l-4 4 4 4 1.5-1.5-2.5-2.5 2.5-2.5-1.5-1.5z'/%3E%3C/svg%3E"); }
Note the part about fill='%23fff' it fills the shape with a color, in this case #fff (white), for red simply replace with #f00
Finally, it is safe to include this (same change for next-icon):
.carousel-control-prev-icon {background-image: url("data:image/svg+xml;charset=utf8,%3Csvg xmlns='http://www.w3.org/2000/svg' fill='%23f00' viewBox='0 0 8 8'%3E%3Cpath d='M5.25 0l-4 4 4 4 1.5-1.5-2.5-2.5 2.5-2.5-1.5-1.5z'/%3E%3C/svg%3E"); }
To customize the colors for the carousel controls, captions, and indicators using Sass you can include these variables
$carousel-control-color:
$carousel-caption-color:
$carousel-indicator-active-bg:
I know this is an older post, but it helped me out. I've also found that for bootstrap v4 you can also change the arrow color by overriding the controls like this:
.carousel-control-prev-icon {
background-image: url("data:image/svg+xml;charset=utf8,%3Csvg xmlns='http://www.w3.org/2000/svg' fill='%23fff' viewBox='0 0 8 8'%3E%3Cpath d='M5.25 0l-4 4 4 4 1.5-1.5-2.5-2.5 2.5-2.5-1.5-1.5z'/%3E%3C/svg%3E") !important;
}
.carousel-control-next-icon {
background-image: url("data:image/svg+xml;charset=utf8,%3Csvg xmlns='http://www.w3.org/2000/svg' fill='%23fff' viewBox='0 0 8 8'%3E%3Cpath d='M2.75 0l-1.5 1.5 2.5 2.5-2.5 2.5 1.5 1.5 4-4-4-4z'/%3E%3C/svg%3E") !important;
}
Where you change fill='%23fff' the fff at the end to any hexadecimal value that you want. For example:
fill='%23000' for black, fill='%23ff0000' for red and so on. Just a note, I haven't tested this without the !important declaration.
If you are using bootstrap.min.css for carousel-
<a class="left carousel-control" href="#carouselExample" data-slide="prev">
<span class="glyphicon glyphicon-chevron-left"></span>
<span class="sr-only">Previous</span>
</a>
<a class="right carousel-control" href="#carouselExample" data-slide="next">
<span class="glyphicon glyphicon-chevron-right"></span>
<span class="sr-only">Next</span>
</a>
Open the bootstrap.min.css file and find the property "glyphicon-chevron-right" and add the property "color:red"
I too had a similar problem, some images were very light and some dark, so the arrows didn't always show up clearly so I took a more simplistic approach.
In the modal-body section I just removed the following lines:
<!-- Left and right controls -->
<a class="carousel-control-prev" href="#id" data-slide="prev">
<span class="carousel-control-prev-icon"></span>
</a>
<a class="carousel-control-next" href="#id" data-slide="next">
<span class="carousel-control-next-icon"></span>
</a>
and inserted the following into the modal-header section
<!-- Left and right controls -->
<a href="#gamespandp" data-slide="prev" class="btn btn-outline-secondary btn-sm">❮</a>
<a href="#gamespandp" data-slide="next" class="btn btn-outline-secondary btn-sm">❯</a>
The indicators can now be clearly seen, no adding extra icons or messing with style sheets, although you could style them however you wanted!
See this demo image:
[![demo Image]](https://i.stack.imgur.com/xoo5v.png)
for bootstrap-3 one can use:
.carousel-control span.glyphicon {
color: red;
}
You should use also: <span><i class="fa fa-angle-left" aria-hidden="true"></i></span> using fontawesome. You have to overwrite the original code. Do the following and you'll be free to customize on CSS:
<a class="carousel-control-prev" href="#carouselExampleIndicatorsTestim" role="button" data-slide="prev">
<span><i class="fa fa-angle-left" aria-hidden="true"></i></span>
<span class="sr-only">Previous</span>
</a>
<a class="carousel-control-next" href="#carouselExampleIndicatorsTestim" role="button" data-slide="next">
<span><i class="fa fa-angle-right" aria-hidden="true"></i></span>
<span class="sr-only">Next</span>
</a>
The original code
<a class="carousel-control-prev" href="#carouselExampleIndicators" role="button" data-slide="prev">
<span class="carousel-control-prev-icon" aria-hidden="true"></span>
<span class="sr-only">Previous</span>
</a>
<a class="carousel-control-next" href="#carouselExampleIndicators" role="button" data-slide="next">
<span class="carousel-control-next-icon" aria-hidden="true"></span>
<span class="sr-only">Next</span>
</a>
a little example that works for me
.carousel-control-prev,
.carousel-control-next{
height: 50px;
width: 50px;
outline: $color-white;
background-size: 100%, 100%;
border-radius: 50%;
border: 1px solid $color-white;
background-color: $color-white;
}
.carousel-control-prev-icon {
background-image:url("data:image/svg+xml;charset=utf8,%3Csvg xmlns='http://www.w3.org/2000/svg' fill='%23009be1' viewBox='0 0 8 8'%3E%3Cpath d='M5.25 0l-4 4 4 4 1.5-1.5-2.5-2.5 2.5-2.5-1.5-1.5z'/%3E%3C/svg%3E");
width: 30px;
height: 48px;
}
.carousel-control-next-icon {
background-image: url("data:image/svg+xml;charset=utf8,%3Csvg xmlns='http://www.w3.org/2000/svg' fill='%23009be1' viewBox='0 0 8 8'%3E%3Cpath d='M2.75 0l-1.5 1.5 2.5 2.5-2.5 2.5 1.5 1.5 4-4-4-4z'/%3E%3C/svg%3E");
width: 30px;
height: 48px;
}
This worked for me:
.carousel-control-prev-icon {
background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' fill='%23000' width='8' height='8' viewBox='0 0 8 8'%3e%3cpath d='M5.25 0l-4 4 4 4 1.5-1.5L4.25 4l2.5-2.5L5.25 0z'/%3e%3c/svg%3e");
}
.carousel-control-next-icon {
background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' fill='%23000' width='8' height='8' viewBox='0 0 8 8'%3e%3cpath d='M2.75 0l-1.5 1.5L3.75 4l-2.5 2.5L2.75 8l4-4-4-4z'/%3e%3c/svg%3e");
}
I changed the color in the url of the icon. Thats the original that is used in the bootstrap page but with this section in black:
"...fill='%23000'..."
If you just want to make them black in Bootstrap 4+.
.carousel-control-next,
.carousel-control-prev /*, .carousel-indicators */ {
filter: invert(100%);
}
With Font Awesome icons:
<!-- Controls -->
<a class="carousel-control-prev" href="#carousel-example-generic" role="button" data-slide="prev">
<span class="fa fa-chevron-left fa-lg" style="color:red;"></span>
<span class="sr-only">Previous</span>
</a>
<a class="carousel-control-next" href="#carousel-example-generic" role="button" data-slide="next">
<span class="fa fa-chevron-right fa-lg" style="color:red;"></span>
<span class="sr-only">Next</span>
</a>
Source: Stackoverflow.com