Examine source code of redandblack

{
  "name": "redandblack",
  "manifest_version": 2,
  "version": "1.0",
  "theme": {
    "images": {
      "theme_frame": "theme.png"
    },
    "colors": {
      "frame": "rgba(28, 28, 28, 1)",
      "tab_background_text": "rgba(173, 97, 97, 1)",
      "toolbar": "rgba(23, 23, 23, 1)",
      "bookmark_text": "rgba(179, 0, 0, 1)",
      "toolbar_field": "rgba(105, 19, 19, 1)",
      "toolbar_field_text": "rgba(168, 168, 168, 1)"
    }
  }
}