gitlab-org--gitlab-foss/app/assets/stylesheets/framework/gitlab_theme.scss

/**
 * Styles the GitLab application with a specific color theme
 */

@mixin gitlab-theme(
  $search-and-nav-links,
  $active-tab-border,
  $border-and-box-shadow,
  $sidebar-text,
  $nav-svg-color,
  $color-alternate
) {
  // Header

  .navbar-gitlab {
    background-color: $nav-svg-color;

    .navbar-collapse {
      color: $search-and-nav-links;
    }

    .container-fluid {
      .navbar-toggler {
        border-left: 1px solid lighten($border-and-box-shadow, 10%);

        svg {
          fill: $search-and-nav-links;
        }
      }
    }

    .navbar-sub-nav,
    .navbar-nav {
      > li {
        > a,
        > button {
          &:hover,
          &:focus {
            background-color: rgba($search-and-nav-links, 0.2);
          }
        }

        &.active,
        &.dropdown.show {
          > a,
          > button {
            color: $nav-svg-color;
            background-color: $color-alternate;
          }
        }

        &.line-separator {
          border-left: 1px solid rgba($search-and-nav-links, 0.2);
        }
      }
    }

    .navbar-sub-nav {
      color: $search-and-nav-links;
    }

    .nav {
      > li {
        color: $search-and-nav-links;

        > a {
          &.header-user-dropdown-toggle {
            .header-user-avatar {
              border-color: $search-and-nav-links;
            }
          }

          &:hover,
          &:focus {
            @include media-breakpoint-up(sm) {
              background-color: rgba($search-and-nav-links, 0.2);
            }

            svg {
              fill: currentColor;
            }
          }
        }

        &.active > a,
        &.dropdown.show > a {
          color: $nav-svg-color;
          background-color: $color-alternate;

          &:hover {
            svg {
              fill: $nav-svg-color;
            }
          }
        }

        .impersonated-user,
        .impersonated-user:hover {
          svg {
            fill: $nav-svg-color;
          }
        }
      }
    }
  }

  .navbar .title {
    > a {
      &:hover,
      &:focus {
        background-color: rgba($search-and-nav-links, 0.2);
      }
    }
  }

  .search {
    form {
      background-color: rgba($search-and-nav-links, 0.2);

      &:hover {
        background-color: rgba($search-and-nav-links, 0.3);
      }
    }

    .search-input::placeholder {
      color: rgba($search-and-nav-links, 0.8);
    }

    .search-input-wrap {
      .search-icon,
      .clear-icon {
        fill: rgba($search-and-nav-links, 0.8);
      }
    }

    &.search-active {
      form {
        background-color: $white-light;
      }

      .search-input-wrap {
        .search-icon {
          fill: rgba($search-and-nav-links, 0.8);
        }
      }
    }
  }

  // Sidebar
  .nav-sidebar li.active {
    box-shadow: inset 4px 0 0 $border-and-box-shadow;

    > a {
      color: $sidebar-text;
    }

    svg {
      fill: $sidebar-text;
    }
  }

  .sidebar-top-level-items > li.active .badge.badge-pill {
    color: $sidebar-text;
  }

  .nav-links li {
    &.active a,
    &.md-header-tab.active button,
    a.active {
      border-bottom: 2px solid $active-tab-border;

      .badge.badge-pill {
        font-weight: $gl-font-weight-bold;
      }
    }
  }

  .branch-header-title {
    color: $border-and-box-shadow;
  }

  .ide-sidebar-link {
    &.active {
      color: $border-and-box-shadow;
      box-shadow: inset 3px 0 $border-and-box-shadow;

      &.is-right {
        box-shadow: inset -3px 0 $border-and-box-shadow;
      }
    }
  }
}

body {
  &.ui-indigo {
    @include gitlab-theme(
      $indigo-200,
      $indigo-500,
      $indigo-700,
      $indigo-800,
      $indigo-900,
      $white-light
    );
  }

  &.ui-light-indigo {
    @include gitlab-theme(
      $indigo-200,
      $indigo-500,
      $indigo-500,
      $indigo-700,
      $indigo-700,
      $white-light
    );
  }

  &.ui-blue {
    @include gitlab-theme(
      $theme-blue-200,
      $theme-blue-500,
      $theme-blue-700,
      $theme-blue-800,
      $theme-blue-900,
      $white-light
    );
  }

  &.ui-light-blue {
    @include gitlab-theme(
      $theme-light-blue-200,
      $theme-light-blue-500,
      $theme-light-blue-500,
      $theme-light-blue-700,
      $theme-light-blue-700,
      $white-light
    );
  }

  &.ui-green {
    @include gitlab-theme(
      $theme-green-200,
      $theme-green-500,
      $theme-green-700,
      $theme-green-800,
      $theme-green-900,
      $white-light
    );
  }

  &.ui-light-green {
    @include gitlab-theme(
      $theme-green-200,
      $theme-green-500,
      $theme-green-500,
      $theme-light-green-700,
      $theme-light-green-700,
      $white-light
    );
  }

  &.ui-red {
    @include gitlab-theme(
      $theme-red-200,
      $theme-red-500,
      $theme-red-700,
      $theme-red-800,
      $theme-red-900,
      $white-light
    );
  }

  &.ui-light-red {
    @include gitlab-theme(
      $theme-light-red-200,
      $theme-light-red-500,
      $theme-light-red-500,
      $theme-light-red-700,
      $theme-light-red-700,
      $white-light
    );
  }

  &.ui-dark {
    @include gitlab-theme(
      $gray-200,
      $gray-500,
      $gray-700,
      $gray-800,
      $gray-900,
      $white-light
    );
  }

  &.ui-light {
    @include gitlab-theme(
      $gray-700,
      $gray-800,
      $gray-700,
      $gray-700,
      $gray-100,
      $gray-700
    );

    .navbar-gitlab {
      background-color: $gray-100;
      box-shadow: 0 1px 0 0 $border-color;

      .logo-text svg {
        fill: $gray-900;
      }

      .navbar-sub-nav,
      .navbar-nav {
        > li {
          > a:hover,
          > a:focus,
          > button:hover {
            color: $gray-900;
          }

          &.active > a,
          &.active > a:hover,
          &.active > button {
            color: $white-light;
          }
        }
      }

      .container-fluid {
        .navbar-toggler,
        .navbar-toggler:hover {
          color: $gray-700;
          border-left: 1px solid $gray-200;
        }
      }
    }

    .search {
      form {
        background-color: $white-light;
        box-shadow: inset 0 0 0 1px $border-color;

        &:hover {
          background-color: $white-light;
          box-shadow: inset 0 0 0 1px $blue-200;
        }
      }

      .search-input-wrap {
        .search-icon {
          fill: $gray-200;
        }

        .search-input {
          color: $gl-text-color;
        }
      }
    }

    .nav-sidebar li.active {
      > a {
        color: $gray-900;
      }

      svg {
        fill: $gray-900;
      }
    }

    .sidebar-top-level-items > li.active .badge.badge-pill {
      color: $gray-900;
    }
  }
}