bootstrap/scss/helpers/_colored-links.scss

@use "../config" as *;
@use "../colors" as *;
@use "../variables" as *;

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

      @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));
          color: color-mix(in srgb, $hover-color, transparent var(--#{$prefix}link-opacity));
          text-decoration-color: color-mix(in srgb, $hover-color, transparent var(--#{$prefix}link-underline-opacity));
        }
      }
    }
  }

  // One-off special link helper as a bridge until v6
  .link-body-emphasis {
    color: color-mix(in srgb, var(--#{$prefix}emphasis-color), transparent var(--#{$prefix}link-opacity));
    text-decoration-color: color-mix(in srgb, var(--#{$prefix}emphasis-color), transparent var(--#{$prefix}link-underline-opacity));

    @if $link-shade-percentage != 0 {
      &:hover,
      &:focus {
        color: color-mix(in srgb, var(--#{$prefix}emphasis-color), transparent var(--#{$prefix}link-opacity, .75));
        text-decoration-color: color-mix(in srgb, var(--#{$prefix}emphasis-color), transparent var(--#{$prefix}link-underline-opacity, .75));
      }
    }
  }
}