Full Spectrum Hair

From the title one might guess that I'm suggesting somebody who is interested in wild hair colors do this as much as possible. Yup!

The usual list of colors of the spectrum, in order of lowest color frequency to highest, is red, orange, yellow, green, blue, violet, and indigo. Other colors can be fit into the scale, such as a particular shade of yellow-green that is considered to be THE color that the human eye is the most sensitive to detecting (and many people consider it to be as glaringly ugly as it is glaringly obvious). Also, a certain shade of brown can precede "red" on the list, even though brown is usually/technically, a very-low-intensity yellow or orange. Finally, black can both precede brown and follow indigo.

Anyway, after selecting a spectral list, the next thing to decide is how to arrange the colors. Here is where the "two general notions" appear.

First, just as an example, let's assume a left-to-right arrangement. Thus, several front-to-back "part" lines are introduced along the scalp between hanks of hair. The leftmost hank gets the first color on the list, the next hank gets the next color, and of course the last hank, on the right side of the head, gets the last color. Obviously, this general notion includes the possibility that the colors could be done front-to-back instead, with the part-lines running left-to-right. Or some diagonal choice might be made, instead.

Second, and rather more difficult to implement, is to divide the LENGTH of hair into even sections. Then the section of hair closest to the scalp gets the first color on the list, the next section gets the next color, until the section of hair farthest from the scalp gets the last color on the list.

Ta-Done!