What Nil said unless you only wear black. Since you wear some other colors get brown.
I know this is against conventional wisdom, but I think it's less about greyscale vs. color and more about whether you wear warm or cold colors. Some colder / greyer browns work very well with black. You wouldn't want to wear tan or chestnut, but stone / taupe / even dark chocolate can look great. It's something to consider
I was between brown and black for my CM - chose brown initially because of CW, but after looking at the gallery I came to believe that TOJ's black lamb is significantly more sexy