What colors do Yorkies come in?

What colors do Yorkies come in?
Yorkies come in four colors — Black, Blue, Tan, and Gold — but all Yorkshire Terrier puppies are born black and tan. As Yorkies age, their coats change to gold and blue (not actually “blue” — it reads as a diluted black color). It takes one to three years for the colors to change, but this blue coloring is the marker of a purebred Yorkshire Terrier. This means older dogs are lighter-colored, losing their black coloring and becoming more gold and tan-colored as they age.