I bought the lavender fitted sheet in a bundle with a turmeric duvet cover, and the color combination is just gorgeous. As the Bed Threads blog has pointed out, the lighter color linen gives off less lint and becomes soft more quickly than the dark-colored ones.
What I have encountered with all the King, fitted sheets is that the corners don't seem to always be where they should be. I have three fitted sheets now, and they are all a little narrow or uneven by an inch or so. For one of them, the corners were so off that I exchanged it for a Cali King. It's not a huge deal for the other two, as the elastic is strong. I appreciated how immediately helpful customer service was in sending me a new fitted sheet.