- <type name="Magento\Theme\Model\View\Design">
- <arguments>
- <argument name="themes" xsi:type="array">
- <item name="frontend" xsi:type="string">Magento/luma</item>
- <item name="adminhtml" xsi:type="string">Magento/backend</item>
- </argument>
- </arguments>
- </type>