Examine source code of Dark Velvet Rainbow

{
  "name": "Dark Velvet",
  "manifest_version": 2,
  "version": "1.0",
  "theme": {
    "images": {
      "theme_frame": "black-screen-dramatic.jpg"
    },
    "colors": {
      "frame": "rgba(56, 50, 59, 1)",
      "tab_background_text": "rgba(255, 0, 0, 1)",
      "toolbar": "rgba(56, 52, 56, 1)",
      "bookmark_text": "rgba(0, 255, 225, 0.87)",
      "toolbar_field": "rgba(34, 22, 38, 1)",
      "toolbar_field_text": "rgba(255, 166, 0, 1)",
      "tab_line": "rgba(255, 187, 0, 1)"
    }
  }
}