Examine source code of Geo Sharp

{
  "name": "Geo Sharp",
  "manifest_version": 2,
  "version": "1.0",
  "theme": {
    "images": {
      "theme_frame": "388350.png"
    },
    "colors": {
      "frame": "rgba(255, 255, 255, 0)",
      "tab_background_text": "rgba(0, 0, 0, 1)",
      "toolbar": "rgba(0, 90, 207, 0.58)",
      "toolbar_field": "rgba(15, 32, 158, 1)",
      "tab_line": "rgba(0, 204, 255, 1)"
    }
  }
}