Caste category

https://www.familysearch.org/ark:/61903/3:1:9392-344F-1?i=53&wc=M647-YM9%3A176795801%2C176795802%2C176983101&cc=1883377

Hola primos,

Can someone help me with this term for Pioquinto Zambrano. In the female's testimony, the groom (my great-great-great grandfather) as casta...Is he a castizo? From other documents, he was described as mulato.

Thank you!