Examine source code of very cool city theme

{
  "name": "very cool city theme",
  "manifest_version": 2,
  "version": "2.0",
  "theme": {
    "images": {
      "theme_frame": "architecture-buildings-china-1366957 header.jpg"
    },
    "colors": {
      "frame": "rgba(255, 255, 255, 1)",
      "tab_background_text": "rgba(255, 255, 255, 1)",
      "toolbar": "rgba(0, 238, 255, 0.34)",
      "bookmark_text": "rgba(255, 255, 255, 1)",
      "toolbar_field_text": "rgba(214, 0, 0, 1)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{1349057d-1d38-4d2e-94d1-125f0ff2ee9f}"
    }
  }
}