In German Folklore, the rainbow is an indicator for where a leprechaun has hidden a pot of gold.
Furthermore it is also the bridge to Asgard, the Bifröst, in ancient Nordic mythology.
In science it is indeed a visual representation, that white light consists of many electromagnetic spectrums.
And in todays day and age it now it stands for gay. 😒
Hitler stole a Hindi symbol. And the gays stole the rainbow 🌈