Macumbeira (masculine macumbeiro, plural macumbeir(o/a)s) is the feminine term for a practitioner of macumba, which is a Brazilian term for "black magic" (religions like Candomblé, Umbanda, any other Afro-Brazilian faiths) :)
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Ohh I see! Thank you for providing a definition, I'll work on this right now ^^
The term has a negative connotation and is reclaimed by practitioners of these faiths. As for colors, I have no preference