Thanks for the information, you're right I darker but it's okay for me
It is actually possible to have 75hz, but it needs to be added to the kernel code. I've actually been experimenting with taking an existing kernel and adding different refresh rates. What I've noticed is that with 90hz or other non-stock refresh rates, the colours seem to be quite a bit darker. As I understand, you are running the Aghisna kernel. Do you notice that darker/different colours when running at 90hz?