Examine source code of Blue Sky

{
  "name": "Blue Sky",
  "manifest_version": 2,
  "version": "1.0",
  "theme": {
    "images": {
      "theme_frame": "headersky.png"
    },
    "colors": {
      "frame": "rgba(57, 146, 247, 1)",
      "tab_background_text": "rgba(255, 255, 255, 1)",
      "toolbar": "rgba(29, 183, 235, 1)",
      "bookmark_text": "rgba(81, 152, 245, 1)",
      "toolbar_field": "rgba(12, 66, 148, 1)",
      "toolbar_field_text": "rgba(0, 183, 255, 1)"
    }
  }
}