Rainbows are associated with a slew of beautiful colors — but pink isn't one of them. So when a pink rainbow showed up around Bristol, England, recently, it definitely stopped people in their tracks.

According to BBC [1], the optical illusion of a pink rainbow is created when a regular rainbow and a pink sunset happen to occur at the same time. The phenomenon is rare but undeniably stunning. Those in the area took to Instagram to share images of the beautiful moment — see the photos ahead.