From Simmons Library:
Racial Microaggressions are commonplace verbal or behavioral indignities, whether intentional or unintentional, which communicate hostile, derogatory, or negative slights and insults in relation to race. They are structurally based and invoke oppressive systems of racial hierarchy. Racial Microinvalidations, Microinsults, Microassaults are specific types of microaggressions.
Tokenism is presence without meaningful participation. For example, a superficial invitation for participation without ongoing dialogue and support, handpicked representatives who are expected to speak for the whole (socially oppressed) group (e.g. ‘tell us how women experience this issue’). Tokenism is often used as a band-aid solution to help the group improve its image (e.g. ‘we’re not racist, look there’s a person of colour on the panel.’). (from Sustainable Campuses)
Similarly, this attitude of "one is enough/they're all the same" contributes to the mindset that one person of color or one Native person can stand in for all people of color and Native people respectively. Not only is it problematic and illogical to assume that one individual's perspective and experiences can be generalized to millions of other people, it also promotes to the idea that a friendship, relationship, or just exposure to one or a few people of color or Native people negates racist thoughts, ideas, or behavior toward others (i.e. "I'm not a racist, my boyfriend is black" or "My costume isn't racist--my best friend is First Nation and she thinks it's hilarious").
Colorblindness is the racial ideology that posits the best way to end discrimination is by treating individuals as equally as possible, without regard to race, culture, or ethnicity. This not only amounts to a dismissal of the lived experiences of people of color, but also suggests that racism does not exist so long as one ignores it.