I'm the author and I submitted it last night, not sure how it went through the repost filter. http://news.ycombinator.com/item?id=3503758 but glad to see it again.
In addition to d3.js and Raphael, it uses an implementation of Lab for D3 by Jeffrey Heer https://github.com/mbostock/d3/pull/183, and the colorblind implementation uses superformulas for D3 by Christophe Viau http://bl.ocks.org/1020902