Examine source code of first rainbow colors

{
  "theme": {
    "images": {
      "theme_frame": "personasforfirefoxheader.jpg"
    },
    "colors": {
      "frame": "#d428c0",
      "tab_background_text": "#14d917"
    }
  },
  "version": "2.0",
  "name": "first rainbow colors",
  "manifest_version": 2,
  "description": "this is my first persona with the colors of a rainbow"
}