macOS Big Sur washed out HDR
When I started using macOS, enabling the HDR checkbox in the Display Perfs section reduced it down to a washed out mess. Saturation was completely off, colors looked wrong and overall the display took a massive hit.
Monitor: dell u2720qm
Mac OS Big Sur 11.6
Mac mini 2018
At the same time I asked Dell
https://www.dell.com/community/Monitors/U2720QM-macOS-washed-out-HDR/m-p/8042189#M137184
Mac mini, macOS 11.6