Examine source code of Ash Grain

{
  "theme": {
    "images": {
      "theme_frame": "header.jpg"
    },
    "colors": {
      "frame": "#eba678",
      "tab_background_text": "#330c0c"
    }
  },
  "version": "2.0",
  "name": "Ash Grain",
  "manifest_version": 2,
  "description": "Simple light ash woodgrain design with easily readable text."
}