Examine source code of Grey and red

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Grey and red",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/bg-027-1049af643fc55b4ffd4a8575444547c5.svg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgba(240, 236, 236, 0.02)",
      "toolbar_text": "rgb(17, 17, 17)",
      "frame": "rgb(183, 179, 179)",
      "tab_background_text": "rgb(8, 8, 8)",
      "toolbar_field": "rgb(248, 184, 184)",
      "toolbar_field_text": "rgb(4, 0, 0)",
      "tab_line": "rgba(255, 0, 0, 0.74)",
      "popup": "rgb(183, 179, 179)",
      "popup_text": "rgb(13, 0, 0)",
      "ntp_background": "rgba(255, 6, 6, 0.08)",
      "popup_border": "rgba(255, 10, 0, 0.74)",
      "sidebar_border": "rgba(255, 0, 0, 0.74)",
      "sidebar": "rgb(183, 179, 179)",
      "tab_loading": "rgba(0, 31, 255, 0.74)",
      "tab_selected": "rgba(183, 179, 179, 0.74)"
    }
  }
}