there are two ways you can go to
http://getbootstrap.com/customize/
and change the color in this adjustments and download the bootstrap customized.
Or you can use sass with this version https://github.com/twbs/bootstrap-sass and import in your sass assets/stylesheets/_bootstrap.scss but before import this you can change the defaults variable colors
//== Colors
//
//## Gray and brand colors for use across Bootstrap.
$gray-base: #000 !default;
$gray-darker: lighten($gray-base, 13.5%) !default; // #222
$gray-dark: lighten($gray-base, 20%) !default; // #333
$gray: lighten($gray-base, 33.5%) !default; // #555
$gray-light: lighten($gray-base, 46.7%) !default; // #777
$gray-lighter: lighten($gray-base, 93.5%) !default; // #eee
$brand-primary: darken(#428bca, 6.5%) !default; // #337ab7
$brand-success: #5cb85c !default;
$brand-info: #5bc0de !default;
$brand-warning: #f0ad4e !default;
$brand-danger: #d9534f !default;
//== Scaffolding
//
//## Settings for some of the most global styles.
//** Background color for `<body>`.
$body-bg: #fff !default;
//** Global text color on `<body>`.
$text-color: $gray-dark !default;
//** Global textual link color.
$link-color: $brand-primary !default;
//** Link hover color set via `darken()` function.
$link-hover-color: darken($link-color, 15%) !default;
//** Link hover decoration.
$link-hover-decoration: underline !default;
and compile the result