If you just want a creamy color then I would suggest crossing the lavender bird onto a production red or New Hampshire. You dont have to worry about the pattern gene with lacing, they grow much faster than Wyandottes and they lay better. If you breed F1s back to golds only 25% (not 50%) of the offspring will carry lavender but you wont know which ones. Also, since you are not worried about lacing it will cost you time, money, feed and, more pens/cages without substantial results. No need to deal with uncertainties when a sibling mating of F1s will leave no doubt which birds are lavender in your F2s. If you are not happy with the lavender F2s then breed those back to the original golds for F3s. Sib mate the F3s to get lavender F4s.