Examine source code of Lowtemp

{
  "theme": {
    "images": {
      "theme_frame": "MinicooperFirefox.png"
    },
    "colors": {
      "frame": "#1f1f8f",
      "tab_background_text": "#1f1ff0"
    }
  },
  "version": "2.0",
  "name": "Lowtemp",
  "manifest_version": 2
}