NMC Standard For The Tan Mouse
Tans are recognised in any standard colour and the top colour shall be as laid down for these varieties. The Tan belly shall be a rich golden hue, as rich as possible and there should be a clear line of demarcation between top colour and tan, running in a straight line along the flanks, chest and jaws. There should be no brindling or guard hairs. Eye colour shall be as in the non tan varieties. Colour of feet should be inside tan and remainder of foot same as top colour. Wholly tan feet considered a greater fault than feet all same colour as top.
Black/Tan Originator: J W Briggs 1896