Yet in CMYK color space, it amounts to 0% of all components and the white is just empty paper. In RGB color space it is made up of the full range of the three color components: red, green and blue. Though there are white pigments and color pencils. How the color is made: white is there, assuming you are using white paper, you don't need to make the color.
It is the color of light, blank canvas, paper and symbol of peace, we can find it in history dating back to 17 thousand years ago. White symbolizes purity, chastity and simplicity. Along with its complementary, black, white is the most used color, well the word color is debatable here, because both of them have no hue.