Changing the Blue background into a lighter color (Fluentsupport ticket form).

Hi All👋,

A quick question—and apologies if I'm not looking properly. How can I change the colors of the Fluent Support form? I want to change the background in one specific area, while leaving everything else the same. See the photo for a visual representation. Would it be possible to change this dark blue background color to a lighter/different color so the characters are more visible?

Thank you in advance for your help.