print #handle, "backcolor COLOR"
This command sets the color used when drawn figures are filled with a color.  The same colors are available as with the COLOR command below.

print #handle, "backcolor red(0-255)  green(0-255) blue(0-255)"
The second form of backcolor specifies a  pure RGB color.  This only works with display modes greater than  256 colors.  To create a green blue color for example, mix green and blue:

print #handle, "backcolor 0 127 200"