Bootstrap/scss/helpers/_colored-links.scss

// stylelint-disable function-name-case

// All-caps `RGBA()` function used because of this Sass bug: https://github.com/sass/node-sass/issues/2251
@each $color, $value in $theme-colors {
  .link-#{$color} {
    --#{$prefix}link-color-rgb: #{to-rgb($value)};
    text-decoration-color: RGBA(to-rgb($value), var(--#{$prefix}link-underline-opacity, 1));

    @if $link-shade-percentage != 0 {
      &:hover,
      &:focus {
        $hover-color: if(color-contrast($value) == $color-contrast-light, shade-color($value, $link-shade-percentage), tint-color($value, $link-shade-percentage));
        --#{$prefix}link-color-rgb: #{to-rgb($hover-color)};
        text-decoration-color: RGBA(to-rgb($hover-color), var(--#{$prefix}link-underline-opacity, 1));
      }
    }
  }
}