Examine source code of ColoBulb

{
  "name": "Screenshot_2018-10-07-09-03-11.000png",
  "manifest_version": 2,
  "version": "2.0",
  "theme": {
    "images": {
      "theme_frame": "Screenshot_2018-10-07-09-03-11.000png.png"
    },
    "colors": {
      "toolbar": "rgba(158, 141, 141, 0)",
      "toolbar_field": "rgba(255, 255, 255, 0.66)",
      "toolbar_field_text": "rgba(18, 13, 13, 0.29)",
      "frame": "rgba(189, 144, 147, 1)",
      "tab_background_text": "rgba(18, 8, 8, 0.39)",
      "bookmark_text": "rgba(255, 245, 245, 0.93)"
    }
  }
}