color bar when printed in black and white

[Dagmar Merkova]

I don't know too much about grads, but if you need to mix gray, you need
the same amount of red, green, and blue. More amount of color the
lighter grey will
(for example: rgb - "0 0 0" is black, "100 100 100" dark gray,"200 200
200" light grey,"255 255 255" white)
Dagmar

Dazhong Yin wrote:
> Hi folks,
>
> I would like to generate a color bar using cbar.gs for shaded plots that if
> I print these plots in black and white, the color bar would gradually
> increase darkness from bars for small values to bars for big values, or vise
> versa. I am no artist and do not know how to mix rgb to get this effect. Has
> anybody tried this?
>
> Thanks for help!
>
> Dazhong
>