Examine source code of Royal brown

{
  "theme": {
    "images": {
      "theme_frame": "head.png"
    },
    "colors": {
      "frame": "#875c5c",
      "tab_background_text": "#bda6a6"
    }
  },
  "version": "2.0",
  "name": "Royal brown",
  "manifest_version": 2,
  "description": "Royal ~"
}