Accent color on title bar appears really ugly. How to deal with it?

[fr1g]

If the switch toggled on here, the app will appear like this on my machine:

I'm new here in wpf developing, and before I start this I always using html, these stuff here made me felt funky. Kinda less freedom? lol.

But anyway, hope to know how do you deal with it. Except let user turn that switch off.