Stage Five of Tie-Dye - Determine what the three primary colors are

It is stated that there is three primary colors for dyes are red, blue, and yellow.

Primary Colors Are Red, Yellow and Blue, Right? Not Exactly | HowStuffWorks comments that there is different primary colors.

What Are Primary Colors?

Primary colors are fundamental colors that serve as the foundation for creating all other colors in the visible spectrum.

If you're talking about painting, then yes: Red, yellow and blue are the primary colors.

If you're talking about physics and light, though, your primary colors are red, green and blue.

The reason for the confusing contradiction is that there are two different color theories: one for colored light, and one for the "material colors" like the ones used by painters or the ones you'll see on a color wheel.

These two theories are known as additive and subtractive color systems.

Additive Color

Cameras, televisions, phones and computer monitors use the additive color model. The additive color model describes how light produces color. The additive colors are red, green and blue, or RGB. Additive color starts with black and adds red, green and blue light to produce the visible spectrum of colors. As more color is added, the result is lighter. When all three colors are combined equally, the result is white light.

Subtractive Color

In the subtractive color model, pigment is used to produce color using reflected light. This color model is used in printing, silk-screening, painting and other mediums that add pigment to a substrate. The subtractive colors are cyan, yellow, magenta and black, also known as CMYK.

Subtractive color begins with white (paper) and ends with black; as color is added, the result is darker. Printers use cyan, magenta and yellow inks in various percentages to control the amount of red, green and blue light reflected from white paper. In theory, adding equal amounts of cyan, yellow and magenta will produce black, but in reality, the result is often a very muddy dark brown. To produce a true black, black pigment is added. Black is referred to as "K," or the key color, and is also used to add density.

When to Choose RGB vs CMYK

It is important to choose the correct color model at the beginning of the project to get the best results. If the final product is for print, remember to convert the color mode from RGB to CMYK. If the final product will only appears on a screen or monitor, keep the color mode as RGB.

Because additive colors use transmitted light, the colors appear much brighter and create a larger visible spectrum, producing millions of colors on a screen. Subtractive colors use reflected light, so they appear muted in contrast. Limited by the ink pigments and tints, a printer can only replicate several hundred thousand colors. Because of this, the RGB colors on a monitor do not always equally translate into CMYK colors when printed on paper or other substrates.

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