Examine source code of Cyan Black

{
  "name": "Cyan Black",
  "manifest_version": 2,
  "version": "2.0",
  "theme": {
    "images": {
      "theme_frame": "Black.png"
    },
    "colors": {
      "frame": "rgba(0, 0, 0, 1)",
      "tab_background_text": "rgba(0, 0, 0, 1)",
      "toolbar": "rgba(0, 0, 0, 1)",
      "bookmark_text": "rgba(153, 209, 212, 1)",
      "toolbar_field": "rgba(98, 153, 151, 1)",
      "toolbar_field_text": "rgba(0, 0, 0, 0.37)"
    }
  }
}