My Coral Charm has some orange leaves, not the whole plant, but I remember Red Grace did this several years ago, and hasn't bloomed since. Could it be from the cold? We are 3 weeks ahead of our normal here.
Last spring - far too much rain
This spring, too much heat, for a time...The plants have a rough time of things.
I am a bit new to the peony world having discovered a plant that appears to be peony just last year, covered with weeds and vines.