This means that the primary colors of the most effective additive color system are simply red, green, and blue RGB. This is why most computer screens, from iPods to televisions, contain a grid of little red-, green-, and blue-emitting light sources.
For a subtractive color system, a certain reflected color is obtained by absorbing the opposite color. Therefore, the primary colors of the most effective subtractive system are the opposites of red, green, and blue, which happen to be cyan, magenta, and yellow CMY.
This is why most printed images contain a grid of little cyan, magenta, and yellow dots of ink. Cyan is the opposite of red and is halfway between green and blue. Magenta is the opposite of green and is halfway between blue and red, and yellow is the opposite of blue and is halfway between red and green.
In summary, the most effective color systems are red-green-blue for additive color systems and cyan-magenta-yellow for subtractive color systems. So where did the red-yellow-blue color system come from that they teach in elementary school? Typically, students first encounter color concepts when painting in an art class in grade school. Paint is a subtractive color system, and therefore the most effective primary colors for painting are cyan, magenta, and yellow.
Note that high-quality paintings typically do not use just three primary colors since more vivid scenes can be achieved using dozens of primary colors. But when teaching art, it's easier to start more simply; with just three primary colors. Now, to a little grade-schooler, the words "cyan" and "magenta" don't mean much. Furthermore, to an undiscerning youngster's eye, cyan looks awfully close to blue and magenta looks awfully close to red.
Therefore, cyan-magneta-yellow becomes corrupted to blue-red-yellow. Elementary art teachers either ignorantly perpetuate this less effective color model because that's how they were taught as children , or intentionally perpetuate it because it's just too hard to teach six-year-old's the difference between cyan and blue. Historical tradition was also a prime driver of the red-yellow-blue color system since it was historically thought to be effective before the details of human vision were understood.
Since the red-yellow-blue color system is less effective, it is not really used anywhere these days except in elementary school art. The color system that best matches the human eye is the red-green-blue color system. What you should teach is that there is a clear relationship between the additive and subtractive colour primaries. The optimal additive primaries are RGB. The optimal subtractive primaries are cyan which is red absorbing , magenta which is green absorbing , and yellow which is blue absorbing.
Now, there is no conflict between the two systems and, in fact, it can be seen that additive and subtractive primaries are almost mirror images of each other. So, if cyan, magenta and yellow are the real deal primaries when it comes to tactile objects, why does just about everyone on the planet still think the honor belongs to red, blue and yellow? It seems intuitive because people believe the following: 1 That it is possible to make all colours by mixing together three primaries, and 2 That the primaries are pure colours that cannot be made by mixing other colours.
Well, yes, according to Westland, the idea that three pure primaries can create al the colors in the world is totally false. If we use three primaries, we can make all the hues, but we cannot make all the colours; we will always struggle to make really saturated vivid colours. Here's the thing: even though we're taught to think of red and blue as "pure" colors, they're simply not.
Here's how to prove that: open an art program on your computer and create a red patch on the screen. Then print the patch using a CMYK printer.
But we will get the biggest gamut of colours using CMY and that is why we can say that CMY are the optimal subtractive primaries just as RGB are the optimal additive primaries. And as far as blue goes, it's not as pure as you think either. Red absorbs in the blue and green parts. If we mix them together, between them they are absorbing everywhere! The resultant mixture, although it may be a purple colour, will be dull and dark.
The absorption spectra of these colours are too broad. It is better to use cyan than blue because cyan absorbs mainly in the red part of the spectrum; and magenta absorbs mainly in the green part of the spectrum. If we add magenta and cyan together we get absorbing in the red and green parts of the spectrum but we allow the blue light to be reflected.
If this in-depth explanation busted every color myth that's been ingrained in your brain since childhood and you're feeling a bit panicked, take heart: coloring books are reportedly great stress busters. And if you're desperate to learn more, check out Westland's two-minute video series on the subject and his blog. Fairchild also created a great resource that he says is for kids, but honestly — every adult should be required to study it.
If you feel like every person you've dated has cited blue as their favorite color , you're probably not mistaken — apparently, 40 percent of the worldwide population says it's their fave purple is a close second at 14 percent.
Sign up for our Newsletter! Mobile Newsletter banner close. Mobile Newsletter chat close. Mobile Newsletter chat dots. Mobile Newsletter chat avatar. Mobile Newsletter chat subscribe. Physical Science. Well, Not Exactly. The primary colors are red, yellow and blue, as we all learned in kindergarten, right?
Well, partly right, but not completely. Wikimedia Commons CC By Now That's Interesting. In art class, we learned that the three primary colors are red, yellow and blue. In the world of physics, however, the three primary colors are red, green and blue. Red, green, and blue RGB are referred to as the primary colors of light.
Mixing the colors generates new colors, as shown on the color wheel or circle on the right. This is additive color. As more colors are added, the result becomes lighter, heading towards white. RGB is used to generate color on a computer screen, a TV, and any colored electronic display device. When you mix colors using paint , or through the printing process, you are using the subtractive color method. The primary colors of light are red, green, and blue.
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