Examine source code of Gibson - Custom

{
  "theme": {
    "images": {
      "theme_frame": "gibsoncopy.jpg"
    },
    "colors": {
      "frame": "#e3d7d7",
      "tab_background_text": "#c1d9e8"
    }
  },
  "version": "2.0",
  "name": "Gibson - Custom",
  "manifest_version": 2
}