Adding Integrity to the Guest Portal: Separate logos/colors for booking websites, guest portal, and reports

Guests currently cannot see my logo in the top menu bar in the guest portal. I want to add my logo to provide more assurance for my guest when they are uploading payment information and personal information. This is due to the global settings that are set for the logo. I need to have a white logo for my booking engine, and a black logo for my guest portal. 

Can there be a global setting for the logo, and an option to upload a different version of the logo for the guest portal, reports, and booking website? Could we also have the ability to change the coloring of the guest portal?

Adding user assurance to our guest portal is crucial for maintaining our integrity. When they are uploading personal information and credit cards to the portal, they want to feel that their info is in a safe place. Especially with how many scammers are out there!