I agree with Jack, he looks like a champagne tan, some of my champagne tans have the tan just on the side and none on the underneath. Im trying to breed the tan out so nearly all are het for tan, it does start to make a big difference after a couple of generations. He does look a bit thin, im having trouble keeping weight on some of my youngsters at the moment i think the improvement in weather will help.
The fox looks like a dilute (cece) also known as beige, coffee, bone depending on shade. They are not standardised in the UK so theres no distinction really between being too light or too dark, in terms of showing in the UK all dilutes are wrong!