As long as you have relatively good cover and REMAIN STILL there is nothing wrong with wearing some black. More ducks have been shot in this country with people wearing old OD, black or even muted plaid clothing than with the latest & greatest camo patterns. Plus, look closely at most any camo pattern and you'll see the base color is black...it creates depth and shadows.
People get way too caught up in the marketing frenzy of whatever new camo pattern comes out each year. The truth is that being where the ducks want to be, covering or masking your bright white face and staying totally still will allow you to kill more ducks than any camo will ever allow.