Tonatiuh is the “Turquoise Lord.”

Tonatiuh was a sun god and was depicted as a symbolic solar disk and sometimes as a squatting man with a disk on his back. Tonatiuh was a nourishing deity who required sacrificial blood to provide people with warmth. He was also the patron saint of warriors.
In many Mesoamerican cultures of the Postclassic period, the hearts of victims were seen as symbolic food for the sun. Tonatiuh was the god most associated with ritual sacrifice; he needed food for his daily victory over darkness.

Warriors were tasked with defeating and collecting prisoners of war, many of whom were chosen as sacrifices to him.