For some reason the color of my curves are dimmed and I barely can see. I tried everything, changed color, reinstalled, downgraded, but still no solution. The curves still works but it's an unnecessary extra effort to work with them.
When I use reference images sometimes I need to guess where the points of my curve are.
EDIT:
I tested the curves of 3DCoatPrint and there the curves are normal. No issues there.