This map draws on data from the 2010 U.S. Census to show one dot per person, color-coded by race — using this perfectly natural schema:
White people are shown with blue dots; African-Americans with green; Asians with red; and Latinos with orange, with all other race categories from the Census represented by brown.
Because it’s morally wrong to use white for white, etc.
Rather than complain about the colors used, it’s more interesting to compare it with maps like these.