I wore a red jacket into the loft and my birds panicked. Usually they’re calm with me.
Do pigeons react to certain colors?
Pigeons see colors well, including into ultraviolet range.
They can definitely react to unfamiliar colors or patterns. Your red jacket looked like a ‘different person’ to them.
Brilliant colors like red might also trigger predator avoidance instincts.
Try to wear consistent colors when handling birds. They recognize you partly by appearance.