Slightly off subject but I’m reminded of the white salsa served along with the red (but sometimes alone) accompanying corn chips at the relatively few Mexican restaurants in Hampton Roads, VA region. I’m from a Mexican food Mecca (San Diego) and I’ve never seen white salsa out here.
We never saw white salsa outside of the Southeast USA either. In Tucson we had a green purée looking salsa at one restaurant. Husband liked it, but I thought it was rather tasteless. (La Parrilla Suizza)