HDMI color bleeding issues?

[Zenurik]

(01-11-2021 05:15 PM)ToastyX Wrote:  Your screen shot cut off the color settings. You need to change the color format. The monitor probably expects RGB. YCbCr 4:2:2 can cause the problem you're seeing. YCbCr 4:4:4 should be fine, but the monitor might convert YCbCr 4:4:4 to 4:2:2 internally.

Oops, sorry. Here it is in full
   

I tried all three modes RGB/YCbCr422/444 but they don't seem to make any difference.