@ColorSage @Monark @_jis_ I'm on the 119 build and I installed the display tester app, and the wide color gamut test fails , but it works as expected when in recent apps.
So I used this site instead to test :
webkit.org/blog-files/color-gamut/
I am able to see the WebKit logo in the second red image which confirms that the display is working correctly and the display tester app is probably buggy. Can you confirm the same for the 121 build?
Just noticed that the app clearly mentions that the WCG test is supported upto android 8/oreo. Maybe that is why the test is buggy on android 10