Hard part with these communities is that many were drivers of systemic racism. The charters would oftentimes include rules about who was allowed to move in.
Don't believe me? Look at the current population mix of any of those planned communities. That should be a rough approximation of the races that were allowed to participate.
These communities provided a leg up for anyone that was allowed in. They received a good subsidized community. It did not, and was not meant to, create an equal playing field for everyone.