Offers pages are part of the Directory-type Campaigns, like the Offers Directory (Directory), Birthday, and Voucher Directory campaigns. There are many ways you can change the design of the Offers Page. One thing you can do is to change the background color of the Offers Page.
To change the background color of the Offers Page. go to the campaign's properties.
Next, go to Directory > Customize Buttons.
Scroll down to the bottom, and you should see the Offers Background Color option.
You can then manually set your desired background color for the Offers page there.
Don't forget to click the Save button at the bottom.