The TIL in question. It links to this wikipedia article. This is the primary source for race-blindness in Ancient Rome.
Can anyone tell me how reliable the source is and how correct it is? I am aware that race has been viewed differently across different time periods and cultures, I just wanted to know if this is how it actually was.
always more to be said on a topic, but while it doesn't address this question specifically, the Monday Methods post on the concept of race, historically, may provide some food for thought for you.