What is a 'pink rainbow', and why does it happen?

A pink rainbow lit up the sky on Monday evening.

Rare Pink Rainbow In Skies Over England Left People With All Kinds Of Feels, Netizens In Awe

Why is this remarkable rainbow predominantly pink?

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Stunning pink rainbow spotted in the skies over Bristol and beyond - Bristol Live

Is the color pink in the rainbow? - Quora

Autism Infinity Rainbow - Seeing the World Differently - Pink

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They Did It To Pluto, But Not To Pink! Please Not Pink! : Krulwich Wonders : NPR

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53,000+ Pink Rainbow Pictures

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