Examine source code of Carbon Stroke

{
  "theme": {
    "images": {
      "theme_frame": "carbon.jpg"
    },
    "colors": {
      "frame": "#474545",
      "tab_background_text": "#4d0000"
    }
  },
  "version": "2.0",
  "name": "Carbon Stroke",
  "manifest_version": 2,
  "description": "Just..Messing around with gimp. it looked pretty cool, so i just wanted to put it out there"
}