pollen color

Hello - Recently saw the pollen charts available from eversweet apiaries and was wondering if anyone knows of a place producing them specifically for the PNW? I do see a lot of the local crops on there (Blackberry, Thimbleberry, etc), but I assume it's somewhat localized to the e. coast...

I have been watching the bees bring in the pollen. And I wonder just what plants have what colors of pollen? Some of the pollen on a workers hind legs are a chocolate brown color. Wonder what it came from? Some bundles of pollen are yellow, some bronze and some red, etc. Do you guys know what...