Examine source code of SummerGNU

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "SummerGNU",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.png",
        "images/1.jpg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "right bottom",
        "right center"
      ],
      "additional_backgrounds_tiling": [
        "repeat-x",
        "repeat-x"
      ]
    },
    "colors": {
      "toolbar": "rgba(14, 76, 84, 0.62)",
      "toolbar_text": "rgb(207, 169, 255)",
      "frame": "rgb(108, 85, 142)",
      "tab_background_text": "rgb(83, 255, 199)",
      "toolbar_field": "rgba(20, 20, 74, 0.59)",
      "toolbar_field_text": "rgb(255, 25, 230)",
      "tab_line": "rgb(240, 134, 128)",
      "popup": "rgb(0, 46, 48)",
      "popup_text": "rgb(11, 173, 205)",
      "tab_loading": "rgb(240, 134, 128)"
    }
  }
}