Examine source code of Rolled Black

{
  "name": "Rolled Black",
  "manifest_version": 2,
  "version": "6.0",
  "theme": {
    "images": {
      "theme_frame": "RolledBlack3.png"
    },
    "colors": {
      "frame": "rgba(5, 5, 5, 1)",
      "tab_background_text": "rgba(255, 255, 255, 1)",
      "toolbar": "rgba(56, 54, 54, 1)",
      "bookmark_text": "rgba(255, 255, 255, 1)",
      "toolbar_field_text": "rgba(250, 250, 250, 1)",
      "tab_line": "rgba(25, 35, 230, 1)"
    }
  }
}