AzuraCast/frontend/scss/vendors/_select2-colors.scss

.select2-search--dropdown .select2-search__field {
  color: $text-primary;
}

.select2-results__message {
  color: $text-secondary;
}

.select2-container--bootstrap4 {
  .select2-selection {
    border: $textfield-border-width solid $textfield-border-color;
  }

  .select2-search--inline .select2-search__field {
    color: $text-primary;
  }

  // focused input box
  &.select2-container--focus {
    .select2-selection {
      border-color: $textfield-border-color-focus;
    }
  }

  // disabled input box
  &.select2-container--disabled,
  &.select2-container--disabled.select2-container--focus {
    .select2-selection {
      color: $textfield-color-disabled;
    }
  }

  // validated input box
  select.is-invalid ~ & .select2-selection,
  form.was-validated select:invalid ~ & .select2-selection {
    border-color: $form-feedback-invalid-color;
  }

  select.is-valid ~ & .select2-selection,
  form.was-validated select:valid ~ & .select2-selection {
    border-color: $form-feedback-valid-color;
  }

  // dropdown
  .select2-dropdown {
    border-color: $textfield-border-color;
    background: $menu-bg;

    // dropdown opened above
    &.select2-dropdown--above {
      border-top: 1px solid $textfield-border-color;
    }

    // selected item
    .select2-results__option[aria-selected=true] {
      background-color: $menu-link-bg-hover;
    }
  }

  // mouse hovered item
  .select2-results__option--highlighted,
  .select2-results__option--highlighted.select2-results__option[aria-selected=true] {
    background-color: theme-color(primary);
    color: $white-primary;
  }

  .select2-results__group {
    color: $text-secondary;
  }

  // all clear button
  .select2-selection__clear {
    $bg: #c8c8c8;
    background-color: $menu-bg;
    color: $menu-link-color;

    &:hover {
      background-color: $menu-link-bg-hover;
    }
  }

  .select2-selection--single {
    // arrow
    .select2-selection__arrow {
      b {
        border-color: $text-primary transparent transparent transparent;
      }
    }
  }

  .select2-selection--multiple {
    // each selected item in input box
    .select2-selection__choice {
      color: $text-primary;
      border: 1px solid $textfield-border-color-hover;
    }

    // x button of each selected item in input box
    .select2-selection__choice__remove {
      color: darken($text-secondary, 20%);

      &:hover {
        color: $text-primary;
      }
    }
  }
}