Examine source code of RED & BLACK Theme by AG

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "RED&BLACK",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/bg-000-5672c42860d5b06e1058dc477397f3ef.svg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(32, 32, 32)",
      "toolbar_text": "rgb(229, 225, 226)",
      "frame": "rgb(0, 0, 0)",
      "tab_background_text": "rgb(223, 219, 219)",
      "toolbar_field": "rgb(21, 20, 21)",
      "toolbar_field_text": "rgb(255, 255, 255)",
      "tab_line": "rgb(176, 0, 0)",
      "popup": "rgb(18, 18, 18)",
      "popup_text": "rgb(226, 226, 226)",
      "button_background_active": "rgb(6, 4, 17)",
      "frame_inactive": "rgb(15, 15, 15)",
      "popup_border": "rgb(176, 0, 0)",
      "popup_highlight": "rgb(162, 12, 12)",
      "tab_loading": "rgb(176, 0, 0)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{d1856d25-436f-450a-8239-3b72446da1c1}"
    }
  }
}