Examine source code of Feathery Calm

{
  "theme": {
    "images": {
      "theme_frame": "header.png"
    },
    "colors": {
      "frame": "#eff2bf",
      "tab_background_text": "#3d2828"
    }
  },
  "version": "2.0",
  "name": "Feathery Calm",
  "manifest_version": 2,
  "description": "cream and green colors with a tad of gold in it."
}