Examine source code of Treehugger

{
  "name": "Treehugger",
  "manifest_version": 2,
  "version": "2.0",
  "theme": {
    "images": {
      "theme_frame": "treehugger.png"
    },
    "colors": {
      "frame": "rgba(255, 255, 255, 1)",
      "tab_background_text": "rgba(204, 204, 204, 1)",
      "toolbar": "rgba(0, 0, 0, 0.8)",
      "bookmark_text": "rgba(255, 255, 255, 1)",
      "toolbar_field": "rgba(255, 255, 255, 0.95)",
      "toolbar_field_text": "rgba(48, 48, 48, 0.9)"
    }
  }
}