AdminLte/build/scss/_main-header.scss

//
// Core: Main Header
//

.main-header {
  background-color: $white;
  border-bottom: $main-header-bottom-border;
  z-index: $zindex-main-header;

  .nav-link {
    color: $dark;
  }
}

@include dark-mode() {
  .main-header {
    background-color: $dark-alt;
    border-bottom-color: tint-color($dark-alt, 10%);

    .nav-link {
      color: $gray-400-alt;

      &:hover,
      &:focus {
        color: $white-alt;
      }
    }
  }
}

//