Examine source code of lavi_dgray man

{
  "theme": {
    "images": {
      "theme_frame": "lavi.jpg"
    },
    "colors": {
      "frame": "#666161",
      "tab_background_text": "#0d0d0d"
    }
  },
  "version": "2.0",
  "name": "lavi_dgray man",
  "manifest_version": 2
}