What is the rarest aurora color?

Have you ever gazed up at the night sky and witnessed the mesmerizing display of an aurora? But did you know that these beautiful light shows come in a variety of colors? While many people associate auroras with the iconic green hues, there's actually a spectrum of colors that can be seen during these celestial events. But what exactly is the rarest aurora color? Is it the vibrant pinks that seem to dance across the sky, or perhaps the elusive purple tones that are rarely captured on camera? Join me as we delve into the mystery of the rarest aurora color and uncover the secrets of these incredible natural phenomena.