Examine source code of Simple Sunset

{
  "theme": {
    "images": {
      "theme_frame": "header.png"
    },
    "colors": {
      "frame": "#540404",
      "tab_background_text": "#ffe100"
    }
  },
  "version": "2.0",
  "name": "Wasted Sunset",
  "manifest_version": 2,
  "description": "I created this theme because I felt most of the themes here lack simplicity. Hope you like it :)",
  "browser_specific_settings": {
    "gecko": {
      "id": "{f3d967bc-2bd7-4445-8f31-282c67742962}"
    }
  }
}