Your rooster, without seeing hen appears crow winged brown-red. As a chick he was nearly brown. As I understand it, he is this birchen E^B which is a very strong promoter of dark coloration. I think that color-wise, at least 50% of the offspring will be dark. If he is homozygous for birchen...
In picture he looks to be in very poor health. Otherwise he appears to carry a lot of black. I assume his sisters were close to black or were back with golden black hackles.
Read link below. To my eye your orphingtons are buff-colored...