zitadel/console/src/app/modules/theme-setting/theme-setting.component.scss

@mixin theme-setting($theme) {
  $primary: map-get($theme, primary);
  $background: map-get($theme, background);
  $foreground: map-get($theme, foreground);
  $is-dark-theme: map-get($theme, is-dark);
  $back: map-get($background, background);

  .theme-flex {
    display: flex;
    align-items: center;
    border: 1px solid if($is-dark-theme, #ffffff20, #00000020);
    border-radius: 50vw;
    padding: 0.25rem;

    .theme-setting-button {
      background-color: transparent;
      border-radius: 50vw;
      display: flex;
      align-items: center;
      justify-content: center;
      height: 2rem;
      width: 2rem;
      border: none;
      cursor: pointer;
      padding: 0;

      .moon,
      .sun {
        color: map-get($foreground, text);
        fill: transparent;
        height: 1rem;
        width: 1rem;
        opacity: 0.7;
      }

      .sun {
        height: 1.5rem;
        width: 1.5rem;
      }

      &:hover {
        .moon,
        .sun {
          opacity: 1;
        }
      }

      &.active {
        background-color: if($is-dark-theme, #ffffff10, #00000010) !important;
        .moon,
        .sun {
          opacity: 1;
        }
      }
    }
  }
}