Examine source code of hot&cold

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "hot&cold",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/bg-026-829b05416f823e170310e7c826ad1bec.svg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgba(8, 22, 237, 0.77)",
      "toolbar_text": "rgb(255, 255, 255)",
      "frame": "rgb(88, 10, 5)",
      "tab_background_text": "rgb(255, 169, 220)",
      "toolbar_field": "rgb(255, 255, 255)",
      "toolbar_field_text": "rgb(17, 110, 32)",
      "tab_line": "rgb(9, 79, 145)",
      "popup": "rgb(17, 126, 129)",
      "popup_text": "rgb(255, 255, 255)",
      "toolbar_field_text_focus": "rgb(38, 129, 25)",
      "tab_loading": "rgb(9, 79, 145)"
    }
  }
}