Examine source code of Lime Shamrocks

{
  "theme": {
    "images": {
      "theme_frame": "LimeShamrocksH.jpg"
    },
    "colors": {
      "frame": "#ffffff",
      "tab_background_text": "#7ed448"
    }
  },
  "version": "2.0",
  "name": "Lime Shamrocks",
  "manifest_version": 2,
  "description": "Light lime green shamrocks to brighten your St. Patrick's Day.  :0)"
}