The debugged color matching tool v1.2 offers much improved color matching capabilities. It’s more accurate, more stable, and much faster. Here’s an example for a red faded 35mm frame from The Empire Strikes Back shared by poita a while ago. The reference is an image of a number of home video versions of the same frame. In this case the frame has been matched to the 2004 DVD colors.
Red faded 35mm frame:
Reference:
Red faded 35mm frame matched to reference: