How to add background to form.
Step 1: Open up Squarespace and find the page you want to add the form. Click ‘‘add block’’. Then find Form.
Step 2: Once you have placed the form out on the Page, you can then click on it. And choose to edit via the pencil icon.
Step 3: Now find ‘‘Design’’.
Step 4 : And then scroll down until you find the ‘‘Background’’. Click on that as showed.
Step 5: Then you can as shown click on the ‘‘Background Color’’ and choose the color that you find works the best for your website.