What is the best way to NOT be offensive?

❗️ I am asking this as a white woman, who is trying to be as conscious as possible. ❗️
This question is for POC. 
I've heard that "color blindness" is good, and that it is not. Personally, I don't know what is the best way to be non-racist. 
When I look at a person, I just see a person. Black, white, purple, or blue, just a person. I struggle, though, with how to be- what's the word?.. -sensitive(?). 
Talking about race makes me genuinely uncomfortable because I 100% have "white guilt", though I don't love that term. I recognize that I am privileged because of things out of my control. 
What is the best way to respond when the topic of race DOES come up, Without being offensive?