It would be awesome to link colors used in multiple places to a parent color swatch. When wanting to change every instance of a specific hex value you could make the change once and have them all update (similar feature in InDesign, I believe?)
You can make a swatch global to achieve this
Option 2! It's wild the things I'm still learning about this program. Thanks, Egor!
Ben, by multiple places you mean different documents or different pieces of a single artwork?
If 1 — use Libraries, I guess. If 2 —just tick Global when creating a swatch.