Now, notice what we have to work with here. We have more yellow, more green, more cyan, more blue, more magenta, and more red. Everything is expressed in terms of more, more, more. There is no less icons and there is like no oranges, there is no violets, there is no purples, there is no indigos. So, you may say here and wonder why is it always more, more, more with this dialog box. And why did they pick these specific colors. Well, I will answer second question first. The reason that they picked these specific colors is because in the big color wheel, these are equidistant colors. So, if you imagine that the color wheel is 360 degrees, which it would be of course, circle is measured in 360 degrees. Then each one of these is 60 from the next along that circle.
Actually if we were to really talk about the colors in a rainbow, these would be them. They would be red, yellow, green, cyan, blue and magenta. That is the truth. And also, if you think about the RGB versus the CMY case scenario, the screen versus the print scenario, we have got the red, green, and blue in this triangle. And then we got opposite it, cyan, magenta and yellow, the three primary colors of print. Black is the fourth color and that is the key color. We will go into that later when we talk about printing from Photoshop.
But for now, just a brief introduction into color theory. So, these are actually the six points along the color rainbow. Now, why always more and not less? Well, because the colors are they are own lesses. Everyone of that mores is a less for something else. For example, more red is the same as less cyan. So, as you add red, you also subtract the opposite cyan. As you add yellow, you are also subtracting the opposite blue. And as you add green you are also subtracting the opposite magenta and so on.
That also works in terms of backing up. So, for example, let us say I have gone a little bit too red in this case I dare say. Then I would back it off by clicking more cyan. And I am actually undoing the more reds by doing this because I am working inside this dialog box. I am actually gone and applied anything to the original image. This is a direct opposite.