Examine source code of Straw dark sky

{
  "theme": {
    "images": {
      "theme_frame": "header.png"
    },
    "colors": {
      "frame": "#031026",
      "tab_background_text": "#f7f5ac"
    }
  },
  "version": "2.0",
  "name": "Straw dark sky",
  "manifest_version": 2,
  "description": "Straw in the wind"
}