Missy, did the Hereford crosses all have a white face?
I had a number of cows crossed that way when I bought them three years back, and saw everything from full white face to not even a spot of white - just a red calf. But I never saw the bull(s).
Angus crosses I've seen a few brindle at birth, but Jerseys tend to throw a brown calf and crossbred (HFxJ) a black one.
HolsteinFriesian x Jersey seems to come in every colour and type combination you can think of. The little black ones with Friesian heads are the ugliest... Black is common. Black and white also. Black with splashes of white. Chocolate brown all over. Tan and white. Go a further cross to Jersey and the dark reds start showing up, or chocolate Jerseys.
Got two BSx heifers to the same dam - a little black cow who's almost pure Jersey. One is light brown, the other mid-grey.