Examine source code of Brave Browser

{
  "manifest_version": 2,
  "version": "1.1",
  "name": "Brave-Fox",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/bg-000-5672c42860d5b06e1058dc477397f3ef.svg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(48, 52, 67)",
      "toolbar_text": "rgb(241, 243, 244)",
      "frame": "rgb(12, 12, 23)",
      "tab_background_text": "rgb(171, 177, 181)",
      "toolbar_field": "rgb(24, 26, 33)",
      "toolbar_field_text": "rgb(238, 238, 238)",
      "tab_line": "rgba(238, 238, 238, 0)",
      "popup": "rgb(48, 52, 67)",
      "popup_text": "rgb(238, 238, 238)",
      "button_background_active": "rgb(76, 79, 92)",
      "button_background_hover": "rgb(64, 68, 82)",
      "frame_inactive": "rgb(61, 61, 69)",
      "icons": "rgb(238, 238, 238)",
      "popup_border": "rgba(76, 79, 92, 0)",
      "popup_highlight": "rgb(62, 63, 68)",
      "tab_loading": "rgba(255, 255, 255, 0)",
      "toolbar_bottom_separator": "rgb(23, 23, 23)",
      "toolbar_field_focus": "rgb(24, 26, 33)",
      "toolbar_field_highlight": "rgb(24, 90, 188)",
      "toolbar_top_separator": "rgba(0, 0, 0, 0)"
    }
  }
}