color — returns the color id of a color
id=color(name) id=color(r,g,b)
color returns the color id corresponding to its argument:
name must be the name of a known color (see color_list).
r, g and b must be integers between 0 and 255
corresponding to colors components red, green and blue. As usual 0 means no intensity and
255 means all the intensity of the color.
If the requested color does not exist in the current colormap it is added to the colormap.
This function can be used to specify the foreground or background colors when plotting.
x=linspace(-2*%pi,2*%pi,100)';
// using existing colors
plot2d(x,[sin(x),cos(x)],style=[color("red"),color("green")]);
// new colors: there are added to the colormap
e=gce(); p1=e.children(1); p2=e.children(2);
p1.foreground=color("purple"); p2.foreground=color("navy blue");
// using RGV values
p1.foreground=color(255,128,128);