Examine source code of blue bubble sky

{
  "theme": {
    "images": {
      "theme_frame": "header.png"
    },
    "colors": {
      "frame": "#fcfcfc",
      "tab_background_text": "#03364f"
    }
  },
  "version": "2.0",
  "name": "blue bubble sky",
  "manifest_version": 2,
  "description": "It is a theme about the sky where dreams are like a bubble."
}