Examine source code of Boston Celtics Theme

{
  "name": "Boston Celtics Theme",
  "manifest_version": 2,
  "version": "1.0",
  "theme": {
    "images": {
      "theme_frame": "bostonceltics.png"
    },
    "colors": {
      "frame": "rgba(229, 230, 232, 1)",
      "tab_background_text": "rgba(0, 0, 0, 1)",
      "toolbar": "rgba(26, 212, 106, 1)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{7ff0b8a8-5dd5-4fb7-9262-46d0424b7601}"
    }
  }
}