Examine source code of bright blue is..

{
  "theme": {
    "images": {
      "theme_frame": "1116--tate-blue-mitounoiki.jpg"
    },
    "colors": {
      "frame": "#e4f7f2",
      "tab_background_text": "#ebf9fa"
    }
  },
  "version": "2.0",
  "name": "bright blue is..",
  "manifest_version": 2,
  "description": "blueが輝く・・　bright blue is..\n\n\n\n\n1116--tate-blue-mitounoiki"
}