How do I turn off night mode on gaming.youtube.com?

I want to disable night mode on gaming.youtube.com after I opted to try it. The option isn't in settings and I cant find it anywhere on the screen. I cant believe a company as big as Google would make such an amateur UX mistake as allowing me to opt into an experimental feature then not making it clear how I can disable it.

How do I disable night mode? (Not the extension, the native YouTube Gaming design feature)