This is a pattern for a blanket incorporating slip stitch mosaic sts influenced by Barbara Walker, from her book, Mosaic Knitting.
It is knit in the round and you have a choice of making a one piece blanket or graft/sew smaller squares together.

to knit 4 individual squares: MC cobblestone heather- 4 skeins, CC dove heather- 5 skeins
to knit one piece 3 colour square: MC cobblestone heather- 3 skeins, CC1 dove heather- 4 skeins, CC2 honey- 2 skeins

Pictured are the 3 colour blanket and 2 colour with 4 squares.