Examine source code of Rainbow Sky

{
  "name": "Rainbow Sky",
  "manifest_version": 2,
  "version": "4.0",
  "theme": {
    "images": {
      "theme_frame": "header.png"
    },
    "colors": {
      "toolbar": "rgba(61, 67, 255, 0.5)",
      "toolbar_field": "rgba(255, 100, 255, 0.5)",
      "toolbar_field_text": "rgba(0, 3, 255, 1)",
      "frame": "rgba(59, 53, 255, 1)",
      "tab_background_text": "rgba(255, 100, 255, 1)",
      "bookmark_text": "rgba(255, 100, 255, 1)"
    }
  }
}