Just upgraded to SW2022 and the sketch colors are completely broken, along with some other anomalies.
I'm using a Quadro RTX 4000 and tried updating drivers to fix it.

It seems to be a graphical bug as some icons, sketch shading, planes, all turn this neon green. It flashes intermittently if as I'm editing other parts as well.
The blue color for undefined sketches is completely gone, all sketches are black. Not good at all. Here's a screenshot