Examine source code of Material Grey Warm

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Material Grey",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/bg-026-829b05416f823e170310e7c826ad1bec.svg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgba(7, 50, 84, 0)",
      "toolbar_text": "rgb(240, 221, 201)",
      "frame": "rgb(56, 56, 56)",
      "tab_background_text": "rgb(226, 218, 210)",
      "toolbar_field": "rgb(225, 225, 237)",
      "toolbar_field_text": "rgb(79, 75, 62)",
      "tab_line": "rgb(181, 195, 195)",
      "popup": "rgb(65, 70, 74)",
      "popup_text": "rgb(237, 237, 237)",
      "icons": "rgb(240, 221, 201)",
      "ntp_background": "rgb(56, 56, 56)",
      "ntp_text": "rgb(222, 220, 218)",
      "tab_loading": "rgb(181, 195, 195)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{6837289f-af4f-49fd-8c83-fd5e5b07149b}"
    }
  }
}