Examine source code of Heavy

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Heavy ",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/bg-044-2454b1459f8c4ee2e38d41030bf1580e.svg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgba(255, 255, 255, 0.7)",
      "toolbar_text": "rgb(15, 44, 164)",
      "frame": "rgb(68, 167, 170)",
      "tab_background_text": "rgb(4, 68, 9)",
      "toolbar_field": "rgba(255, 255, 255, 0)",
      "toolbar_field_text": "rgb(12, 136, 20)",
      "tab_line": "rgb(0, 0, 0)",
      "popup": "rgb(56, 175, 177)",
      "popup_text": "rgb(0, 1, 4)",
      "tab_loading": "rgb(0, 0, 0)"
    }
  }
}