Examine source code of green and grey

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Light green",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.jpg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "right top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(46, 48, 66)",
      "toolbar_text": "rgb(145, 180, 172)",
      "frame": "rgb(8, 11, 33)",
      "tab_background_text": "rgb(101, 179, 149)",
      "toolbar_field": "rgb(54, 58, 89)",
      "toolbar_field_text": "rgb(209, 251, 234)",
      "tab_line": "rgb(32, 191, 140)",
      "popup": "rgb(55, 58, 91)",
      "popup_text": "rgb(161, 161, 161)",
      "tab_loading": "rgb(32, 191, 140)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{ec757de9-88f0-4bd6-9b8b-68a9fa1a5a4c}"
    }
  }
}