Hello,

You need to clone the header and change the text color scheme in the row settings: https://xtemos.com/docs-topic/create-new-headers-with-header-builder/ and https://xtemos.com/docs-topic/header-rows-and-columns-configuration/

Then assign this header for the single product page in the Theme Settings > Single product.

If you have any questions please feel free to contact us.

Best Regards