Locality of this Rosy Boa?
 

Adopted from a local rescue in San Diego

He seems more orange/grey in the pics but brown/blue in person.

Someone said maybe Rincon, but not sure if that's a locality?

Without knowing where the parents were collected, you can't know the locale. Many of the coastal locales look similar, and it could be a cross. It is a 'generic' (in typical snake lingo) or 'NLS' ('non-locale-specific' which is my preferred term, usually used by gecko people) coastal rosy boa. It is a nice looking snake; enjoy it!

I agree with John's thoughts, Non local boa, definitely a Coastal. For a much broader range of locality it would be pretty safe to call it a Riverside Co. Cheater.
Even that is speculative though.
But really, it doesn't matter, you have a good, healthy looking rosy.
They're fantastic.