How to recolor a background specifically for 1 custom liquid block

[Vo_va]

Hi community!

I am building a landing page with Klaviyo form. 
I embedded the form. But I want to have not white background, but matched with Klaviyo form color. 

Any assistance on this matter would be greatly appreciated! Thanks!

[Moeed]

Hey @Vo_va 

Welcome to Shopify Community! Can you share your Store URL so I can have a look on it? Also, if you have password enabled then please share the password as well. Your cooperation would be greatly appreciated.

Best Regards,
Moeed

[Vo_va]

Here it is https://genderxbeauty.de/pages/extravaganza-pre-launch

thank you in advance)