Monochromatic grays are my favorite. Gray isn't so intense that it makes you look like you're trying to set a mood or have an agenda. There are also so many different shades you can mix and match well.
I found this cape over the holidays right after I found these pastel gray denim jeans and I couldn't wait to pair them together. Because the cape is reversible (a trend that seems to be starting in my wardrobe - see here) It adds a lot of dimension to the gray palate I was going for. This statement necklace was also perfect with silver chains contrasted against the clear crystals - you can find mine, the Mia, here or similar ones similar here and here.