Examine source code of Custom Footer

{
  "theme": {
    "images": {
      "theme_frame": "header.png"
    },
    "colors": {
      "frame": "#2e7794",
      "tab_background_text": "#967b7b"
    }
  },
  "version": "2.0",
  "name": "Custom Footer",
  "manifest_version": 2,
  "description": "It's an illusion background footer theme"
}