Wig.
True, straight hair is a sign of the white race as the Black Is Beautiful movement in the late 1960s opposed. Started the Afro hairstyle trend.
In and X Files where a blonde woman was obviously attracted to Mulder after she was under threat from a villain who sought out one type of woman victim to sacrifice due to an ancient obsession,
Mulder said “Do you think she really fits the profile of being a blonde virgin?”
Scully: “At this point I don’t even think she’s really a blonde.”