Examine source code of Caveira R6

{
  "name": "Caveira R6",
  "manifest_version": 2,
  "version": "1.0",
  "theme": {
    "images": {
      "theme_frame": "caveira.png"
    },
    "colors": {
      "frame": "rgba(15, 156, 95, 1)",
      "tab_background_text": "rgba(80, 201, 105, 1)",
      "toolbar": "rgba(6, 120, 44, 1)",
      "bookmark_text": "rgba(93, 227, 165, 1)",
      "toolbar_field": "rgba(187, 252, 203, 1)",
      "toolbar_field_text": "rgba(28, 133, 96, 1)"
    }
  }
}