This image is based on a rare depiction of an Aztec person wearing paint. Aside from the yellow-paint women used and the occasional black coloring Priests used on their skin, most Aztecs did not wear paint or tattoos, they usually differentiated themselves from 'others' by their use of body paint. Even in war, there is still on-going debate as to whether Aztecs used paint in battle. Certainly it was used during war rituals (but this was also used during non-military rituals as well). The question remains controversial.
The image comes from the Codex Borbonicus. The woman holds a bowl carrying pulque. The skirt is red with nopal drawings weaved in. The skirt is also fringed at the hem. I am uncertain what the design on her huipil is supposed to be.