Thank you all, and yes I would say this is true to her colour by my eyes. Even seeing her in person it's difficult to say which mutation she most resembles, she doesn't seem quite right for any of them, which is why I wondered if there was a violet factor involved, not just for the purpley hue but the brightening effect it has, but I thought grey would completely hide violet, I may well be mistaken there though
and there may be no violet involved at all, poor Marcie, she's an oddball! hehe, a lovely one of course