chromium/ash/webui/personalization_app/resources/js/keyboard_backlight/keyboard_backlight_element.html

<style include="common cros-button-style">
  :host {
    --color-container-size: 48px;
  }

  #container {
    display: grid;
    grid-template-areas:
      '. label   .'
      '. options .'
      '. .       .';
    grid-template-columns: 12px 1fr 20px;
    grid-template-rows: auto 1fr 20px;
  }

  @media (max-width: 700px) {
    #container.preview-container {
      grid-template-rows: auto 1fr 8px;
    }
  }

  #keyboardBacklightLabel {
    align-items: center;
    background: none;
    border: none;
    display: flex;
    flex-flow: row nowrap;
    grid-area: label;
    justify-content: space-between;
    margin-block-start: 20px;
    margin-inline-start: 8px;
  }

  #keyboardBacklightLabel > p {
    color: var(--cros-text-color-primary);
    font: var(--personalization-app-label-font);
    margin: 0;
  }

  color-selector {
    grid-area: options;
  }

  #zoneCustomizationButton[aria-pressed='true'] {
    background-color: var(--cros-sys-primary, var(--cros-button-background-color-primary));
    color: var(--cros-sys-on_primary, var(--cros-button-label-color-primary));
  }

  #zoneCustomizationButton[aria-pressed='true'] .text {
    margin-inline-start: 8px;
  }

  #zoneCustomizationButton:not([aria-pressed='true']) iron-icon {
    display: none;
  }
</style>
<div id="container" class="preview-container">
  <div id="keyboardBacklightLabel">
    <p class="title">$i18n{keyboardBacklightTitle}</p>
  </div>
  <color-selector
      selected-color="[[backlightColor_]]"
      on-wallpaper-color-selected="onWallpaperColorSelected_"
      on-preset-color-selected="onPresetColorSelected_"
      on-rainbow-color-selected="onRainbowColorSelected_">
    <div slot="button-container" class="customization-button-container">
      <cr-button id="zoneCustomizationButton" on-click="showZoneCustomizationDialog_"
          class="secondary"
          aria-pressed$="[[getZoneCustomizationButtonAriaPressed_(currentBacklightState_)]]">
        <iron-icon
            class="customized-checkmark"
            icon="personalization-shared:circle-checkmark">
        </iron-icon>
        <div class="text">$i18n{zoneCustomize}</div>
      </cr-button>
    </div>
  </color-selector>
  <template is="dom-if" if="[[isZoneCustomizationDialogOpen_]]" restamp>
    <zone-customization on-cancel="closeZoneCustomizationDialog_"></zone-customization>
  </template>
</div>