fluorescent colors after update to Catalina 10.15.4

Thanks. Turning off HDR worked as a temporary solution. The picture isn't as nice as it was, but for a screen used primarily for work it is acceptable for now, and way better than the fluorescent colours. Weird.

There have been a few threads recently.

Common solutions, or at least workarounds, that have been mentioned:

• turning off HDR
• switching the display to use DisplayPort v1.2

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Carol_82 wrote:

I updated my computer to Catalina 10.15.4 this week and every time after my computer went in hibernation, the colors on my screen turn fluorescent.

My computer is a Mac Pro, my screen is an LG HDR 4K.

Anyone who can help please?

Reboot is always the first try.

If no resolve—Try resetting NVRAM/PRAM http://support.apple.com/kb/ht1379

if it is a sleep issue then carry on and try resetting the SMC https://support.apple.com/en-us/HT201295

I upgraded to 10.15.4 last night and have the same fluorescent colour problem, and also using a LG 4K screen. Did you resolve the issue?