The white on a dog like Luka is a very faded tan. You mentioned black and silver - that is also a basic black and tan, with the tan faded to almost white.
The different colours like black and silver, black and creme, black and tan, black and red, are all black and tans with different amount of pigment in the tan areas. Technically they are not different colours - all the same colour with some dogs having more pigment, and others less.
Gryffon Vom Wildhaus
BH, OB1, TR1, AD
Rottweiler/Hairy Dog mix?? 2004-2015