Examine source code of acheron hsr theme

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "acheron",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.png"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "right top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgba(31, 22, 45, 0)",
      "toolbar_text": "rgb(244, 238, 216)",
      "frame": "rgb(15, 11, 22)",
      "tab_background_text": "rgb(187, 183, 175)",
      "toolbar_field": "rgb(58, 51, 70)",
      "toolbar_field_text": "rgb(244, 238, 216)",
      "tab_line": "rgb(240, 228, 177)",
      "popup": "rgba(15, 11, 22, 0.95)",
      "popup_text": "rgb(244, 238, 216)",
      "ntp_background": "rgb(39, 33, 48)",
      "tab_loading": "rgb(240, 228, 177)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{b238f670-245b-4321-bf95-3eea16ec5485}"
    }
  }
}