For the CMYK color scheme, color specifications must be enclosed in quotation ... In the previous example, the color name from the prefix dark and the hues gray and red is described as dark grayish ...

Occasionally, authors use a sequence of colors, such as the 'rainbow' color scheme, to represent a range ... us about its relative ordering on the dark-to-light scale. On a computer, we can ...

When this happens, light becomes separated into a rainbow of colors—red, orange, yellow, green, blue, indigo (blue-violet), and violet. In this activity, you can make your own rainbow.