Examine source code of Red blast

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Red blast",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/bg-011-d53e0d0d1538ed554a90e056a2f04eca.svg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(255, 0, 0)",
      "toolbar_text": "rgb(6, 12, 13)",
      "frame": "rgb(152, 56, 56)",
      "tab_background_text": "rgb(251, 251, 251)",
      "toolbar_field": "rgb(255, 10, 45)",
      "toolbar_field_text": "rgb(255, 255, 255)",
      "tab_line": "rgb(65, 192, 210)",
      "popup": "rgb(53, 197, 218)",
      "popup_text": "rgb(252, 252, 252)",
      "tab_loading": "rgb(65, 192, 210)"
    }
  }
}