tlapallacuiloque.

Apparently this term was used as a way of distinguishing people who painted with color from people who wrote on paper, usually called tlacuiloque (the latter, generic term could serve for either writers or painters). (Tulancingo, 1570)
James Lockhart, Nahuas and Spaniards: Postconquest Centerl Mexican History and Philology, Nahuatl Studies Series 3 (Stanford and Los Angeles: Stanford University Press and UCLA Latin American Studies Center, 1991), 90.