Examine source code of CleanBlue

{
  "theme": {
    "images": {
      "theme_frame": "header.png"
    },
    "colors": {
      "frame": "#9edcf0",
      "tab_background_text": "#ffffff"
    }
  },
  "version": "2.0",
  "name": "CleanBlue",
  "manifest_version": 2,
  "description": "This is a flat design centered theme featuring gradients and object layering. This nice theme uses various hues of blue to produce a clean, sleek, and elegant design. Perfect for all users."
}