Examine source code of holy_head

{
  "theme": {
    "images": {
      "theme_frame": "Persona_Header_LABS.jpg"
    },
    "colors": {
      "frame": "#2559c7",
      "tab_background_text": "#fc0303"
    }
  },
  "version": "2.0",
  "name": "holy_head",
  "manifest_version": 2
}