I ordered these sheets in green.  The green is kind of between medium and dark in color.  I remembered we had loved the knit sheets some years ago and then had trouble finding them for some time.  Theses sheets are not all cotton.  They are half cotton and rayon, both natural fibers, and half polyester.  These sheets are very, very soft.  They stay smooth on the bed and do not bunch up at all.  I have a cotton quilt and the top sheet stays smooth with the quilt all night long, does not shift out of place.  They are cool and comfortable.  Love these sheets and they are very economical as well.

Pros: The bottom sheet lays perfectly smooth on my Tempurpedic mattress.  No bunching up of either sheet during the night.
Cons: Not all cotton if you are looking for that.