Examine source code of GALAXXxy

{
  "name": "GALAXXxy",
  "manifest_version": 2,
  "version": "2.0",
  "theme": {
    "images": {
      "theme_frame": "space_stars_blue_background_80369_2048x1152.jpg"
    },
    "colors": {
      "frame": "rgba(41, 82, 171, 1)",
      "tab_background_text": "rgba(10, 116, 122, 1)",
      "toolbar": "rgba(28, 27, 27, 1)",
      "bookmark_text": "rgba(36, 36, 102, 1)",
      "toolbar_field": "rgba(66, 67, 77, 1)",
      "toolbar_field_text": "rgba(29, 34, 46, 1)"
    }
  }
}