My dog's fur has turned Yellow?

I have a white half breed Pekingese/Dachshund dog. After giving him a bath with an aloe vera shapoo and the anti-fleece afterwash called Sebacil, he turned bright yellow! I've been using the same shampoo for weeks with no problem. I think it's the the anti-fleece because it was the first time I used it on him. Is there anything I can do to make him white again and what may have been the cause of this?