So the pink, or as I call it purple, is a common problem in MacOS. There is a patch script out there, but it didn't work for me on Mojave/Catalina. This is due to monitor EDID information passed back to MacOS upon initialization. I found a hack to force it from
YPbPr color space to
RGB color space to try and fix that issue, but so far it has been unsuccessful. I used Hackintool and it created the correct profile and resolution options kexts and fixed my issue in Mojave/Catalina with Clover... not sure how it will play out in Big Sur and OC. Search these forums for "purple"
Latest build of Hackintool with some Big Sur fixes...