Examine source code of GreenandColorado

{
  "name": "GreenandColorado",
  "manifest_version": 2,
  "version": "10.0",
  "theme": {
    "images": {
      "theme_frame": "Green Colorado Overlook b.png"
    },
    "colors": {
      "frame": "rgba(255, 255, 255, 0)",
      "tab_background_text": "rgba(36, 113, 163, 1)",
      "toolbar": "rgba(36, 110, 163, 0)",
      "bookmark_text": "rgba(169, 50, 38, 1)",
      "toolbar_field": "rgba(169, 50, 38, 0)",
      "toolbar_field_text": "rgba(36, 113, 163, 1)"
    }
  }
}