Examine source code of Lime Thorns

{
  "name": "Lime Thorns",
  "manifest_version": 2,
  "version": "3.0",
  "theme": {
    "images": {
      "theme_frame": "header.png"
    },
    "colors": {
      "frame": "rgba(229, 230, 232, 1)",
      "tab_background_text": "#ebebeb",
      "bookmark_text": "rgba(56, 53, 53, 1)"
    }
  }
}