Examine source code of Kouro Theme

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Kouro Theme V2",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/bg-000-5672c42860d5b06e1058dc477397f3ef.svg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(58, 83, 147)",
      "toolbar_text": "rgb(255, 255, 255)",
      "frame": "rgb(0, 53, 86)",
      "tab_background_text": "rgb(226, 226, 226)",
      "toolbar_field": "rgba(32, 32, 32, 0.8)",
      "toolbar_field_text": "rgb(255, 255, 255)",
      "tab_line": "rgba(174, 188, 253, 0)",
      "popup": "rgb(207, 207, 207)",
      "popup_text": "rgb(43, 60, 82)",
      "button_background_active": "rgb(6, 28, 68)",
      "button_background_hover": "rgb(15, 115, 183)",
      "ntp_background": "rgb(38, 43, 68)",
      "popup_border": "rgb(0, 0, 0)",
      "tab_loading": "rgba(174, 188, 253, 0)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{7fac0c5a-a87a-45b0-9646-0c889385a9b2}"
    }
  }
}