Levitt had a career-long commitment to a whites-only policy in their developments.[dubious – discuss] Levitt & Sons would not sell homes to African Americans.
1950 somthing
As of the 2010 census, Levittown was 87.7% White, 5.1% Hispanic or Latino ancestry of any race, 3.6% Black or African American, 1.7% Asian, 1.6% were two or more races, 0.3% were some other race and 0.2% Native American.[16][31]
Wikipedia has all the history.
I now recal when the first black couple bought there. I lived in a mixed neighborhood in Philly