cmap = white(m)
white
white(m) returns an m-by-3 matrix containing a white colormap. For a mesh or surface plot, the white colormap ensures that all lines are visible.
white, with no input or output arguments, is the same length as the current colormap.
colormap,cool,copper,flag,gray,hot,hsv,pink,rgbplot
(c) Copyright 1994 by The MathWorks, Inc.