Since this is a serious question, be warned that the above answers are wrong. The absence of all light is black. The color white is a result of the combination of all the colors in the spectrum. That is why you can break white light into colors with a prism. When an item is red it absorbs all the colors of the spectrum except red, which it reflects back to your eye. When an item absorbs all the colors of the spectrum it is black. No colors are reflected back to your eye. When an item reflects the full spectrum it is white.
The answer above is correct. There is an exception. If you add light, the colors red, blue and green , at equal intensities, will make white. This is how our computer monitor reproduces white on your screen.
Assuming that you are talking about light not paint; the first answer is wrong, black is the total absence of white light; hence why shadows appear black. The second answer has some truth in it: that white light can projected by displays by mixing red, green and blue light in specific measurements. To reiterate, white light can be made by the colours of the visible spectrum in an infinite amount of combinations.
How many colors to make white color If you are talking about light and not pigment, then the blending of all the frequencies of visible light gives white. It's more of a continuum of frequencies rather than a mix of discrete colors.
The fist answer, by Michael Harris, is correct. Of course you need light to see colors...Duh. Anything which appears white is reflecting all the colors of the spectrum. Anything which appears black is absorbing all the colors of the spectrum.
Some of you are somewhat correct. As a color specialist for makeup, clothing and accessories for over 30 years ...... and designer of a color & makeup program for wearing the correct colors for your skin, hair and eyes, I submit the following .... Prism or not ... White is the absence of all color and Black is the presence of all color. That's it!
Playing with computer software programs that use color may come up with a different set of parameters as does 3 or 4 color printing for intensity and clarity in the printing of books.
For those of you who named colors ..... there are 3 Primary colors ...Red Yellow Blue.. The Secondary colors are Green Orange Purple. Red and Yellow make Orange. Yellow and Blue make Green. Blue and Red make Purple. Please look at a color wheel. The Tertiary (third degree) colors are made by taking 2 adjacent colors and combining them. To make each color lighter ... add white. It just lessens the intensity of the color..... as in Lavender (lite) and Purple (dark) or Powder Blue (light) and Navy Blue (dark).
A primary color can be any of the red, blue, or yellow pigments available to a painter. But for a photographer, RGB, the color space that most cameras use, is based on a Red/Green/Blue color wheel. The CYM color system is modeled with a Cyan/Magenta/Yellow color wheel. Finally, the RYB system relies on a Red/Yellow/Blue color wheel. The distinct color system a camera uses will produce an image within a defined color wheel. While painters rely on an RYB color wheel, photographers tend to capture their shots with either the RGB or CMY color wheel systems. (Photography.com). This has been an argument my husband and I have had for 34 years. He's a photographer and I am an artist.
White is all the colors, that is why when you send white light through a prism it splits it up to R O Y G B I V the colors of the rainbow. The absence of all color is black, thus space being black when you look up at the stars.
Depends on if it is pigment or light. When dealing with light, there is what is known as 'additive' mixing, in which combing all colors eventually gives you white. With pigments, such as paint or colored pencils, you have 'subtractive' mixing, where combing all colors gives you black instead, as pigments and light refraction are two different things to work with.
If you are talking about paint, then no mix can create white color. If you are talking about light, then you can either do it by mixing all 7 color of the rainbow or mix yellow with blue (you can make yellow out of equal strength of red, green, and blue, you can get white by adding more power on blue light).