Gray pollen in Seattle area now is most likely from the blackberry, our major nectar source, which is now blooming everywhere. Orange pollens my bees recently brought in were Japanese snowbell and cistus (I did ID under microscope), but yours could be false dandelion, multiflora rose, or other plants, depending on what you have nearby.
A honey bee with blackberry pollen.
A honey bee with cistus (rockrose) pollen.