I was enthralled last night with the deep blue of the late evening sky. Blue seems to be a color that in itself, uninterrupted, unpatterned, is profoundly engaging. I think that certain shades of ochre strike me that way, too. But considering green I thought that green is most amazing when it is in company with other shades. Like emeralds set in a piece of jewelry, or the myriad shades of green in the expanse of a forest or meadow. It’s the interrupted green which is most engaging. And in a single shade – a lime green wall, a kelly green dress – it seems dull. Gray is another that seems most engaging by it’s variation, such as in the layered clouds of a tumultuous day, or the stained rocks of a cliff-face.