I've been looking into these squadron's markings more and I've figured out the codes and tail shapes for each squadron :
428th - F5 - Square
429th - 7Y - Triangle
430th - K6 - Circle
But the colors are kind of confusing. You can see from the above profiles there is some conflicting information. Over at WarbirdInformationExchange there is a guy who is a historian for the 474th Fighter Group Association and in answering another question he mentioned that the 428th FS colors were actually a dark blue, which is often mistaken for black on old photos. I suspect the 429th used red and am pretty sure the 430th used yellow. I'm hoping the historian chap will get back to me with a confirmation on that.
DW