At that age the coat has faded and is sunburnt. Makes actual color really hard to tell.
Color of parent does not always rule out color of foal. It all depends on the genetics actually involved. Knowing the parents parents colors can help.
Two black parents can have a red baby but not bay. Two reds can only have red but a red and black could have red, black or bay. Same with bay and black or bay and red. The color you see only tells you part of the genetics for sure.
I am still seeing red but that could just be the lighting and quality of the photos. I see dark ears but not black tips and I don't see black in the tail.
Some horse people change their horse, they change their tack and discipline, they change their instructor; they never change themselves.