It would actually require a bit more explaining to tell for sure it was perception through the Brow Chakra (Third Eye). Each chakra (not just the main seven chakras either) is actually capable of being used to view the world around you in a different perspective.
You can poinpoint what was happening by studying the chakra systems and energy flow. Meditate, ground, do whatever you need and try to work from the ground-up and see which chakra fits what you had seen.
It could have been energy you were seeing, the opening of your third eye, or even something non magical which is usually the case. Seeing colors can also be caused by a blood sugar drop or rise, floaters in your eye or even retinal damage. Just food for thought lol. L.L.B ~ Angie