Examine source code of Coarse Grey2

{
  "theme": {
    "images": {
      "theme_frame": "header.jpg"
    },
    "colors": {
      "frame": "#f9f9f9",
      "tab_background_text": "#f9f9f9"
    }
  },
  "version": "2.0",
  "name": "Coarse Grey2",
  "manifest_version": 2,
  "description": "A minimal grey persona with a tinge of reduced noise."
}