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Hm, true, it also appears to be more of a purple-ish colour than the Pink Prominent. I'd go with Rosy maple with that in mind.
I understand the Pink Prominent tends to have some pink coloration on the head, while the Rosy Maple's head is all yellow. Check these links to compare them:
rosy maple
http://bugguide.net/node/view/466
pink prominent:
http://bugguide.net/node/view/3794
Did you paint to match the moth or does the moth have good Interior Design taste? Great color coordination and photo.