Examine source code of Red Atmosphere by Ryan

{
  "theme": {
    "images": {
      "theme_frame": "header.png"
    },
    "colors": {
      "frame": "#a18686",
      "tab_background_text": "#ffffff"
    }
  },
  "version": "2.0",
  "name": "Red Atmosphere by Ryan",
  "manifest_version": 2,
  "description": "One of the series of themes for rotation.  This is a simplistic, blurred red and dark colors."
}