Can you help me with my colour issues?

Yep! It’s not just you! Confirmed on Chrome latest on macOS. This is a widespread Chrome bug and not a Webflow or design-related issue on your end.

Another topic on the matter: https://discourse.webflow.com/t/weird-bg-discoloration-whats-happening-webflow-link-inc

Another external source: macos - Background colors in Chrome and Atom are no longer uniform - Ask Different