White is recorded as the first color ever used in art, with Paleolithic artists using white calcite and chalk to draw. Throughout much of history, white has been elected as a symbol of goodness, spirituality, purity, godliness, and sacredness. Ancient Egyptian gods, Greek gods, Roman goddesses were all depicted as clad in white to symbolize their deity. White is considered the symbolic opposite of black, with the two colors together forming symbols of good and evil, night and day, light and dark, etc.
White is usually a requirement for certain competitions where it is unacceptable to wear bright colours i.e. Dressage. It is challenging to keep clean and that is why most of us will only use white for competitions.