Examine source code of Slate Legion

{
  "theme": {
    "images": {
      "theme_frame": "slatelegionh.jpg"
    },
    "colors": {
      "frame": "#c4b69f",
      "tab_background_text": "#0d0d0d"
    }
  },
  "version": "2.0",
  "name": "Slate Legion",
  "manifest_version": 2,
  "description": "Slate Legion.\n\nI designed this skin around the colour tan to match a forum I often visit. However after some experiment it turned out looking nicer somewhere between tan and slate gray. I was going for a sorta abstract granite or medieval look. I wanted something slate, granite, easy on the eyes and minimalistic (but not overly plain)."
}