Primary colors and luminance ranges

In addition to selecting an image by identifying key colors using that…Eyedropper the Color Range command also let's you select predefined color…and luminance ranges.…And we are going to see how that works inside this image.…And what I've done is map all the colors in the visible spectrum, at least where…the world of digital imaging is concerned onto a big wheel.…And so we start over here in right- hand side with red, progress through…yellow and so forth.…The most intensely versions of each color are located along the perimeter of the…wheel and then toward the center we see the Saturation drop off until the very…center point is absolutely gray.…

Now each of the primary colors of light is identified with this old-style CRT monitor.…So we've got red and green and then toward the bottom of the image we have blue…and each of the primary colors in the print world is identified by this little…printer, so we've got cyan, magenta and then up north here we have yellow.…I've also gone ahead and identified some secondary colors such as orange, and…