Examine source code of Oled black high contrast

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Oled black high contrast",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/bg-000-5672c42860d5b06e1058dc477397f3ef.svg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(0, 0, 0)",
      "toolbar_text": "rgb(0, 255, 28)",
      "frame": "rgb(0, 0, 0)",
      "tab_background_text": "rgb(4, 218, 237)",
      "toolbar_field": "rgb(0, 0, 0)",
      "toolbar_field_text": "rgb(0, 255, 28)",
      "tab_line": "rgb(255, 0, 4)",
      "popup": "rgba(0, 0, 0, 0.99)",
      "popup_text": "rgb(0, 255, 28)",
      "button_background_active": "rgb(44, 144, 177)",
      "frame_inactive": "rgb(0, 0, 0)",
      "icons": "rgb(0, 144, 255)",
      "ntp_text": "rgb(0, 255, 28)",
      "tab_selected": "rgb(49, 93, 154)",
      "tab_loading": "rgb(255, 0, 4)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{9b9f34ff-9e76-4853-8702-d0b92fc38d32}"
    }
  }
}