Thanks all. ; For full disclosure, I was waiting for blue hour, just around sunset I decided to hit the restroom...figuring actual blue hour was still 15-30 minutes away. ; It was an overcast sunset and not very nice color so I didn't figure I was missing much. ; When I came out of the restroom, I saw this sky - this last little gasp of sunlight was casting a beautiful orange that wasn't there during the sunset itself...and the overcast clouds were high and rippled as it was a cold front and dropping to the 40s that night. ; Lucky timing too - 5 minutes later, all the color was gone...5 minutes before, it wasn't there.