Feature Request: Customizable Space Themes / Background Colors for Visual Distinction

Like many users, I maintain separate Spaces for work and personal/private data. I often find myself accidentally creating notes or tasks in the "wrong" Space because there’s no immediate visual cue telling me where I am.

It would be amazing if each Space could have its own theme or custom background color. Having a strong visual indicator would make it instantly obvious which context/Space you're working in and prevent cross-contamination of personal and work data.