Examine source code of Winter Essentials

{
  "theme": {
    "images": {
      "theme_frame": "header.png"
    },
    "colors": {
      "frame": "#e2e9f5",
      "tab_background_text": "#70001e"
    }
  },
  "version": "2.0",
  "name": "Winter Essentials",
  "manifest_version": 2,
  "description": "warm red gloves, hot chocolate, snow, gingerbread cookie, candy cane, marshmallows, mug"
}