When you hear the word "bullfighting" or "matador," you are likely to think of a spectacular Spaniard with a large piece of red cloth to taunt an enraged bull. The bull is pouncing on the muleta (that's the name of the "red cloth") as hard as he can, without showing any interest in the offender himself. From the outside it may seem that the bull is extremely disgusted with the color red - what else can irritate the animal so much?

It is even common to recall the image of the bull and the red rag when one wants to describe one's irritation with something.
In fact, the matador and bull dance is a skillfully staged performance. The matador (or toreador) does taunt the bull with a red cloth, but it is the size, not the color, that counts. The fact is that the retina of the animal has very many rods and very few cones. The rods are responsible for the black and white image and the recognition of the shape of objects. The cones are responsible for color vision. Thus, the bull doesn't care what color the cloth is. All that matters to him is the presence of something big and tantalizing, looming right in front of him.
The red cloth is used primarily to make it clearly visible to the audience. If the cloth were to be made visible to the bull, it should have been dyed pure white or pure black. A bull can pounce on a man and not a rag. That is why an experienced matador directs an enraged animal to the muleta, hiding behind it, and retreats to the side at the very last moment (when the bull has already accelerated and can not switch to him himself).
In 2010, bullfighting (bullfighting) was officially banned in Spain, and the performance itself was considered cruel to the animals and dangerous for the participants themselves. But bullfighting is not only a performance (although cruel and dangerous), but also a huge industry employing hundreds of thousands of people. That is why, since the first ban, several times the courts have allowed, and several years later banned again, popular public events involving a man, a bull and a muleta, the traditional "red rag".