“You know, I don't even see you as black.”
You know this situation:
Source: redsuspenders.tumblr.com
Source: redsuspenders.tumblr.com
People told you you "sounded white."
This is often coded as a compliment, i.e., so-and-so is "eloquent"/"articulate"/etc.
Source: blackkatemoennig.tumblr.com
Or they called you an "oreo" and just thought they were sooo clever and original.
[For those who don't know, an "Oreo" is someone who is "black on the outside, white on the inside."]
Source: barbaricman.tumblr.com