Definitely you had seen somewhere the bullfighting, in which someone shows a red cape or muleta to the bull and he gets aggressive but have you ever wondered why does the bull get aggressive after seeing a red cape?
Let's see,
The myth that bulls become furious when they see red, or are unsually savage creatures, comes from the tradition of bullfighting, where a bullfighter waves around a red cape, or a muleta, and the bull accuses the cape with fervor.
However, it's not the colour of the cape that incenses the bull but it's the movement of the cape. We know this based on many experiments with different colored capes being stationary and being moved and the bull favored movement over the color of the cape every time.
We also know that bulls are actually red-green colorblind and would have a hard time distinguishing red from green, orange, and brown.
