PENCOLOR
PC

	outputs a color number, a nonnegative integer that is associated with
	a particular color, or a list of RGB values if such a list was used as
	the most recent input to SETPENCOLOR.  There are initial assignments
	for the first 16 colors:

	 0  black	 1  blue	 2  green	 3  cyan
	 4  red		 5  magenta	 6  yellow	 7 white
	 8  brown	 9  tan		10  forest	11  aqua
	12  salmon	13  purple	14  orange	15  grey

	but other colors can be assigned to numbers by the PALETTE command.