Are racially mixed marriages permissible, or do we have an obligation to keep the races distinct?

Mixed-race marriages are permissible. This is indicated by biblical example in both the Old and the New Testaments. In the Old Testament, Joseph’s wife was the daughter of an Egyptian high priest (Gn 41:45), and he had two sons by her (41:50-52), who were then adopted by his father Jacob (48:5-6) and became the progenitors of the tribes of Ephraim and Manasseh, even though they were half-Egyptian.

Moses also married the daughter of a foreign priest (Ex 2:21, 3:1), and the fact he had taken a foreign wife became a bone of contention with his brother and sister (Nm 12:1), but God vindicated him of this and other charges (Nm 12:8).

In the New Testament, Timothy was the product of an ethnically mixed marriage since he had a mother who was a Jew but a father who was a Greek (Acts 16:1).

Because interracial marriages are not condemned anywhere in Scripture, because the biblical example includes interracial marriages, and because Christ, in one sense, has obliterated all ethnic divisions (Col 3:11) and rendered all people clean so there is no need for ethnic separation (Acts 10:28-29, Gal 2:11-14), interracial marriages are permissible.