Becky, I think SC Color Scheme is resistant.
Ash Rosie, alas, is susceptible.
Interestingly, Ash Rose is a defined colour. From Websters:
"Definition of ash rose
: a variable color averaging a grayish red that is bluer and paler than bois de rose, bluer and less strong than appleblossom or Pompeian red, and bluer, lighter, and stronger than livid brown."
But what attracts me is the graduation of colour from the throat, greenish to yellow to orange and then to an indented, ghostly watermark before ash rose. On the sepals the bases are almost white.
Click on the image. It is like a feather from some exotic parrot species.