A black rainbow is a real thing; it appears where water drops
Full Worm Moon bright enough to create rainbow at 2:30 a.m.
Twice dyed: Raven black water drop over rainbow spiral. Big fan of this one : r/tiedye
A black rainbow is a real thing; it appears where water drops reflect light away from the viewer. : r/Damnthatsinteresting
Superior Police Department - In order to observe a rainbow, a person needs to be between suspended droplets of water and a source of light AND they must observe the refracting and
Why do rainbows come when it rains? - Quora
Can a rainbow appear at night? - Quora
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Would a black “rainbow be possible? : r/NoStupidQuestions
Meet 'Firebows,' the Flat, Rainbow-Like Stacks That Appear in Sunny Skies - Atlas Obscura