Welcome to YT! This is such a fun stage imo, Maddie is 6 months and most of the hair on the top of her head is a silvery color, and we are just now seeing her real tan start to come in at the roots. they all have different "breaking" patterns and tend to keep changing over the next year and up to 3 years. Oh and usually there coat gets a thicker again too it wont stay so sparse and thin

It to me like she will have a correct silky, blue and tan coat. What color were her parents?
I like this link, I think that it is very informative
Top Yorkshire Terrier Genetics Blue Tan Coat Color Yorkies Colors Yorkie Coat Color