Leslie
This one did seem to change a lot from newly opened buds to older blooms.
This picture was of a just opened bud.
This one is a few days old.
Blooms are from the same plant. Several of the Schreiner's iris that were new intros last year seem to do the fading thing. Downtown Brown would be another example. I wonder if it is something that they are breeding in on purpose, or just a factor of the dark colors of the iris.