Examine source code of WhitishBlue.

{
  "theme": {
    "images": {
      "theme_frame": "whitestblue_h.png"
    },
    "colors": {
      "frame": "#1303fa",
      "tab_background_text": "#0f0e0e"
    }
  },
  "version": "2.0",
  "name": "WhitishBlue.",
  "manifest_version": 2,
  "description": "The pale persona. \nPlease try to use it because I think means easy to use."
}