Here is the finished brioche knit cowl that I made with yarn that had a long color shift. I absolutely love the play of color that appeared by knitting it from opposite ends of the same pull skein.

The yarn was two ply with each ply a separate color, so some sections were solid color, but others were purple and gray, or blue and purple, and the colored sections were long. As I was rolling up the yarn into two separate balls, I did find some knots from the manufacturer that put an abrupt color change in the yarn. I reknotted those sections to different areas of the yarn that had a closer match. It pays to rewind commercially spun long repeat yarn to check for inappropriate color changes due to knots.