Examine source code of Zumsteel

{
  "theme": {
    "images": {
      "theme_frame": "Z1.jpg"
    },
    "colors": {
      "frame": "#6e6868",
      "tab_background_text": "#0a0a0a"
    }
  },
  "version": "2.0",
  "name": "Zumsteel",
  "manifest_version": 2,
  "description": "Underside view of a Zumsteel Hybrid pedal steel guitar"
}