Examine source code of Coils and Cubes

{
  "theme": {
    "images": {
      "theme_frame": "header.png"
    },
    "colors": {
      "frame": "#0eb50e",
      "tab_background_text": "#09013d"
    }
  },
  "version": "2.0",
  "name": "Coils and Cubes",
  "manifest_version": 2,
  "description": "A theme I made while messing with colours and shapes. Never draw with a mouse, it's way too time-consuming."
}