Merriam-Webster adds new meaning for 'color-blind,' says it can show racism.  

Though the term means "not influenced by differences of race," and especially "treating all people the same regardless of race," color-blind can also have a racist connotation, according to the influential dictionary.

The race-related sense of the word "can be used with positive connotations of freedom from racial prejudice," the note says, but "it often suggests a failure or refusal to acknowledge or address the many racial inequities that exist in society, or to acknowledge important aspects of racial identity."