Bastian Schmülling never ceases to impress me with always eye-pleasing concepts. This one for the Kings is no exception. Grey doesn't stand out as a particularly good jersey color. But as we saw in the Stadium Series, it could make for a very nice alternate jersey if you do it right. In this case, I think it's definitely been done right.
With his revised design, Bastian writes: "Inspired by Kris' comment about my silver Kings-jersey, I've created a matching black version. While he suggested use silver yokes/stripes and white accents, I prefer white as the secondary-color."