Single numeric value or fixed color name

Syntax: | `SET AREAFILLCOLOR c GET AREAFILLCOLOR { c }`

The area under the curve or histogram will be filled with the solid color `c`.

If `c` is a positive numeric scalar value, it represents the index of the color in the currently loaded `COLORMAP`.

A negative numeric scalar value represents the index of a fixed color. A string value should be one of the fixed color names.

For example:

`SET AREAFILLCOLOR 2` | uses the colormap index 2
`SET AREAFILLCOLOR -2` | uses the fixed color index 2 ("RED")
`SET AREAFILLCOLOR RED` | uses the fixed color name "RED"

If `HISTOGRAMTYPE = 2` (or `4`), then the `GRAPH` command produces a histogram profile with tails to x=0 (or y=0).

If `AREAFILLCOLOR` is set to a single numeric value or to a fixed color name, all the histogram bars will be filled with the same solid color.

AREAFILLCOLOR
Numeric vector