Examine source code of RedMoonOled

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "redmoon",
  "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(146, 86, 86)",
      "frame": "rgb(0, 0, 0)",
      "tab_background_text": "rgb(133, 114, 114)",
      "toolbar_field": "rgb(4, 3, 3)",
      "toolbar_field_text": "rgb(248, 210, 210)",
      "tab_line": "rgb(228, 158, 158)",
      "popup": "rgb(0, 0, 0)",
      "popup_text": "rgb(239, 142, 142)",
      "button_background_active": "rgb(0, 0, 0)",
      "frame_inactive": "rgb(0, 0, 0)",
      "icons": "rgb(164, 105, 105)",
      "ntp_background": "rgb(0, 0, 0)",
      "ntp_text": "rgb(156, 122, 122)",
      "sidebar_border": "rgb(84, 61, 61)",
      "tab_background_separator": "rgb(32, 32, 39)",
      "tab_loading": "rgb(0, 0, 0)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{dc52e184-c689-457d-bd91-0bd15b9f2644}"
    }
  }
}