That's a pretty awesome dinker pairing, most likely some kind of dirty ivory/champagne morph, really cool, cant wait to see if it proves co-dom like the ivory.
Very cool! It reminds me a bit of Ben Siegel's ultra ivories from the orangebelly line. If not the same, I wouldn't be surprised at all if that mutation happens to be allelic to the ivory/super stripe complex. I'd definitely breed him and/or his father to a YB or ivory female next season (or a spector or super stripe female if possible) though to see if you get anything similar.