I imagined my Wizarding World character, Paul Graves, walking around carrying a yellow umbrella, like the one I own.
It would never happen. The man does the 'formal business suit, black umbrella' thing all the way.
His son, Seth, however, informs me that his umbrella is deep blue.
On Pern, Aerden will use whatever's at hand, or just run out into the Weyr Bowl bareheaded and grouse at the rain.