Examine source code of simpleton 2

{
  "theme": {
    "images": {
      "theme_frame": "simpleton-2a.png"
    },
    "colors": {
      "frame": "#000033",
      "tab_background_text": "#000000"
    }
  },
  "version": "2.0",
  "name": "simpleton 2",
  "manifest_version": 2,
  "description": "simple gray blueish, 2 tone"
}