Examine source code of Clayish

{
  "theme": {
    "images": {
      "theme_frame": "head.jpg"
    },
    "colors": {
      "frame": "#ffffff",
      "tab_background_text": "#292117"
    }
  },
  "version": "2.0",
  "name": "Clayish",
  "manifest_version": 2,
  "description": "an abstrackt pattern created with some ground clayish colours to make a very calm visual identity for the browser"
}