What's white called?

White is also called plain color, pure color.

White is the color that contains all colors of light in the spectrum. It is usually considered as "colorless" (but contrary to the colorless of black), with the highest brightness and zero hue. White light can be obtained by mixing the three primary colors of light in the spectrum: red, blue and green in a certain proportion. The mixture of all visible light in the spectrum is also white light.

White always symbolizes the purity of friendship and love.