Examine source code of Mulled Wine

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Mulled Wine",
  "icons": {
    "32": "images/icon.svg"
  },
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/bg-017-7074520d97b5c592d413aed5f115f093.svg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(38, 35, 53)",
      "toolbar_text": "rgb(233, 218, 253)",
      "frame": "rgb(74, 62, 95)",
      "tab_background_text": "rgb(233, 218, 253)",
      "toolbar_field": "rgb(36, 27, 47)",
      "toolbar_field_text": "rgb(233, 218, 253)",
      "tab_line": "rgb(247, 163, 242)",
      "popup": "rgb(74, 62, 95)",
      "popup_text": "rgb(233, 218, 253)",
      "icons": "rgb(247, 163, 242)",
      "ntp_background": "rgb(36, 27, 47)",
      "ntp_text": "rgb(233, 218, 253)",
      "tab_loading": "rgb(247, 163, 242)"
    }
  }
}