No. The white of the paper never counts as a color. A one-color cover is one ink-color on white paper, so unless you fill up the whole cover with that ink-it could be black or red or green or any other color-you’ll have contrast. You start with blank cover stock, you add one ink to it, and you have a one-color cover. A two-color cover is two colors on white, and a three-color cover is three colors on white. Designers often use screens to get other tints or colors without having to pay for them. For example, a 50% screen used with black will yield a gray in the area screened, and a 50% screen of red will yield a pink, and so on. In addition, the combination of two screens gives you the effect of a third color. (I.e. blue plus yellow equals green, yellow plus red equals brown and so forth.) Once you get to four-color the rules change. Sometimes people new to publishing make the mistake of not thinking of black as a color. It surely is. The confusion comes in because we contrast black-and-white movies with those that are “in color.” A book cover printed in black and red is a two-color job. What color ink will you be using for the text of your book? Black!