kazhnuz.css/scss/_colorize.scss

/* ------------------ COULEURS ------------------- */

$color-button-light: $color-light;
$color-button-dark: $color-dark;

@mixin button-lighten($background-color, $text-color) {
  background-color: lighten($background-color, 10%); 
  color:$text-color;
}

@mixin button-color($background-color, $text-color) {
  background-color: $background-color;
  color: $text-color;
  &, &:not(.disabled):not(:disabled) {
    &:hover, &:active, &:focus {
      @include button-lighten($background-color, $text-color);
    }
  }
}

@mixin badge-color($background-color, $text-color) {
  background-color: $background-color;
  color: $text-color;
    &, &:not(.disabled):not(:disabled) {
    &:hover, &:active, &:focus, a:hover > &, a:active > &, a:focus > & {
      @include button-lighten($background-color, $text-color);
    }
  }
}

/* BUTTONS & BADGES */

.btn, a.btn, .badge, .chip, a.chip, a.badge, .label, a.label {
  &-blue { @include button-color($color-blue, $color-button-light); }
  &-violet { @include button-color($color-violet, $color-button-light); }
  &-purple { @include button-color($color-purple, $color-button-light); }
  &-red { @include button-color($color-red, $color-button-light); }
  &-orange { @include button-color($color-orange, $color-button-light); }
  &-green { @include button-color($color-green, $color-button-light); }
  &-skyblue { @include button-color($color-skyblue, $color-button-light); }
  &-dark { @include button-color($color-dark, $color-button-light); }
  &-light { @include button-color($color-light2, $color-button-dark); }
  &-turquoise { @include button-color($color-turquoise, $color-button-light); }
  &-yellow { @include button-color($color-yellow, $color-button-light); }
  &-brown { @include button-color($color-brown, $color-button-light); }
  &-grey { @include button-color($color-grey, $color-button-light); }
  
  &-primary { @include button-color($color-primary, $color-button-light); }
  &-secondary { @include button-color($color-secondary, $color-button-light); }
  &-warning { @include button-color($color-warning, $color-button-light); }
  &-danger { @include button-color($color-danger, $color-button-light); }
  &-info { @include button-color($color-info, $color-button-light); }
  &-success { @include button-color($color-success, $color-button-light); }
}

/* social */

.btn, a.btn {
  &-facebook {@include button-color(#3B5998, $color-button-light);}
  &-twitter {@include button-color(#55ACEE, $color-button-light);}
  &-googleplus {@include button-color(#d34836, $color-button-light);}
  &-diaspora {@include button-color(#313739, $color-button-light);}
  &-mastodon {@include button-color(#282c37, $color-button-light);}
}