decimal to hex translation for colors



Hello:

I am looking for a way to graph a collection rectangles (using draw2d) with colors specified by an array of numerical values.  According to the documentation I found, I can specify a color as a hexadecimal string in the form "#rrggbb."  Assuming that I have the rgb intensities as integers (or floats, if that is easier), is there a way of turning these into hexadecimal numbers?  Or better yet, is there a way to take a triple of intensities and produce the corresponding #rrggbb string?

Many thanks in advance!

Jorge
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Dr. Jorge Alberto Calvo
Associate Professor of Mathematics
Department of Mathematics and Physics
Ave Maria University

Phone: (239) 280-1608
Email: jorge.calvo at avemaria.edu<mailto:jorge.calvo at avemaria.edu>
Web: http://sites.google.com/site/jorgealbertocalvo