Microsoft Office Visio 2007 Professional provides the ability to color shapes by different values in selected cells. This is great, but just how many color variations can your eyes detect? If you have lots of different values, then the color by value automatically produced colors can look too similar to be able to distinguish them apart. In this article, I propose a method of automatically assigning different fill patterns to similar colors so that they can be visually separated.
Read the rest of this entry »