Examine source code of Rainbows are Coool

{
  "theme": {
    "images": {
      "theme_frame": "header.png"
    },
    "colors": {
      "frame": "#5c5252",
      "tab_background_text": "#000000"
    }
  },
  "version": "2.0",
  "name": "Rainbows are Coool",
  "manifest_version": 2,
  "description": "Hey y'all I created this theme to make sure that you never forget that rainbows are super duper cool."
}