Examine source code of Team Rocket Rainbows

{
  "theme": {
    "images": {
      "theme_frame": "Image1.jpg"
    },
    "colors": {
      "frame": "#85cf0f",
      "tab_background_text": "#1c1818"
    }
  },
  "version": "2.0",
  "name": "Team Rocket Rainbows",
  "manifest_version": 2,
  "description": "My first one-- I'm planning on modifying it but I just wanted to see how to put one together first."
}