Vendor Store Background

Hi Team & community,

We are adding a lot of stores to our platform, but before they upload a product, their store page looks pretty ugly.

This is because the background is green (our brand color), and only changes to simple gray after adding a product. (https://wordpress-598900-2679635.cloudwaysapps.com/verkoper/ads-kringlooponline-rotterdam)
Is it possible to change this color?

We have tried in the settings ‘store style’ but no succes.d

Any other settings?

The page I need help with: [log in to see the link]