Re: Pollen Color Chart?
I have not found a color chart specific for Western Washington. I think this Wikipedia site is still the best (https://en.wikipedia.org/wiki/List_of_pollen_sources).
The popular pollen species my bees bring back look like the following (do Google search on the code to get the color).
Cherry (#a8692a), March - April
Willow (#ebae3d), March - April
Dandelion (#eb721c), all year
Big-leaf maple (#838554), April
Tulip poplar (#d9d07e), June
Blackberry (#747a6d), June
Knotweed (#a8a772), August
Ivy (#e8af13), September - October
Zone 8, elevation 70 ft, near the north end of Lake Washington