I have got a lot of purples from non-purple, but they typically show from very specific backgrounds, and not in this rare ash-y tone, which is more specific to only a few lines of roses. The parents listed don't match those ideas.
Considering how close the stems, bud clustering type, and foliage are to 'Rhapsody in Blue', I would be more inclined to believe the stated parents are a seed or pollen parent, and not the sole parents.
I have this rose now in the garden for the third year and it is extremely sensitive to black spot. There are about 200 kinds of roses in my garden and this rose is one of the most sensitive. Spray with celaflor, liqui cop or rosacur hardly helps. Only Spray with Topsin (an old antifungal) helps a bit. That's very unfortunate, because the flowers are beautiful
