http://www.mathworks.com/matlabcentral/newsreader/view_thread/265105 MATLAB Central Newsreader - Inverted Color Box Feed for thread: Inverted Color Box en-us &copy;1994-2012 by MathWorks, Inc. webmaster@mathworks.com MATLAB Central Newsreader http://blogs.law.harvard.edu/tech/rss 60 MathWorks http://www.mathworks.com/images/membrane_icon.gif Thu, 05 Nov 2009 17:05:20 -0500 Inverted Color Box http://www.mathworks.com/matlabcentral/newsreader/view_thread/265105#692471 NIcholas I have a heat map image that I want to draw boxes over to highlight certain regions. I am currently using the "line" command to draw lines of a certain color. I want to be able to draw lines that change color to contrast the background. So for example, if I am drawing on a blue background the line will be red and vice versa.<br> Is there any way to do this?