Examine source code of Brave Dark Theme

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Brave Dark",
  "theme": {
    "images": {},
    "properties": {},
    "colors": {
      "toolbar": "rgb(49, 52, 66)",
      "toolbar_text": "rgb(255, 255, 255)",
      "frame": "rgb(12, 12, 22)",
      "tab_background_text": "rgb(255, 255, 255)",
      "toolbar_field": "rgb(24, 26, 32)",
      "toolbar_field_text": "rgb(255, 255, 255)",
      "tab_line": "rgba(49, 52, 66, 0)",
      "popup": "rgb(49, 52, 66)",
      "popup_text": "rgb(255, 255, 255)",
      "button_background_active": "rgb(75, 78, 90)",
      "button_background_hover": "rgb(65, 68, 81)",
      "frame_inactive": "rgb(61, 61, 69)",
      "ntp_background": "rgb(12, 12, 22)",
      "popup_border": "rgba(12, 12, 22, 0)",
      "popup_highlight": "rgb(75, 78, 90)",
      "tab_loading": "rgba(49, 52, 66, 0)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{652eb9a0-456b-4b9b-b790-ff203e9ed1ff}"
    }
  }
}