This should be no surprize. The term moors is very misleading. It is a European term. Berbers can be any color. People in Northern and Western Europe--and the US divide up people by color. No one else does.

We believe that thousands of years ago the Sahara was a grassland peopled with hunters and gatherers who were black. Gradually the Sahara dried up and the hunterers and gatherers retreated South. None the less trans-Saharan trade, contact and intermarriage, slave trade, etc continued. Slavery among the Berbers can't be compared to slavery in the US. Slaves were more of a caste, a way of integrationg people with no clan/caste relationships into the Berber social hierarchy. I am black and lived in Tunisia for two years. There are still pockets of Berber speakers in the South. And in towns were the caravans came in from the Sahara, the popultion is comprised of some of the every skin color imaginable.

Intermarriage is between light and dark skinned people in North Africa is very common.