Black and white races are equal - in the New Testament?

To me, it's simple that black and equal races are equal. But recently, black people have had a lower status than white people and also suffered from discrimination as everybody knows, and I'm wondering, because Christianity has been around for more than 2000 years, and these issues were among white Christians, so I'm wondering maybe what we think today, wasn't simply understood to people in past, therefore I'm looking for proofs/verses from the **New** Testament that support or oppose the idea that black and white people are equal in their rights etc.