Where Did All the Color Go?

On the day of a sola eclipse, all color in the world suddenly vanishes, leaving everything in shades of gray. Scientists can't explain it, and people struggle with the lifeless world. A man named Aj notices something strange under a lone streetlamp, Stepping under he realizes color still exists. Reds, blues, and greens shimmer within the bounds of the light, but the moment he steps beyond its reach, everything fades back to gray.

Aj doesn't know why this single beacon holds color within its light... Do you?