As I wrote on the other site : Your issue is not with Firefly. You are rendering old node setups that use TONS of faking, (including that "sorry" stupid light blue) in a newer render engine that does not need that faking at all.

Any other render engine would give you the exact same result.

Your figure is in the shadow, and the figure is tinted light blue, and that darkens the figure more then required.

Hope this helps? Have a nice day.

To correct your issue? => Most of what I did was delete nodes that are no longer required.