Now, while wildflowers often do rather well in overcast light
(at least for photographing closeups),
take a look at this nice but not terribly distinctive view of arrowleaf balsamroot flowers (balsamorhiza sagittata) in overcast light:
And compare it with this:
Arrowleaf balsamroot was growing everywhere in Capitol Reef.
Another year, I will try to get down there when the orchards at Fruita are all in bloom!