When they say "I do not see color," they do not want to acknowledge the injustices relevant to the case at hand. If they do not see color, they they feel that they are washing their hands of the racism and bigotry we see in society. Even when committing racist acts, they may also say they do not see color. Slave owners claimed they were not racist. So, at the end of the day, you are right. This is modern-day erasure.