This is a really gross oversimplification of design principals that ventures into "not even wrong". It makes a statement that you need four colors (as if you c

This is a really gross oversimplification of design principals that ventures into "not even wrong". It makes a statement that you need four colors (as if you couldn't possibly make a usable site with more or less) and then locks you into a 1D slider. That slider gives you four colors without much explanation on that page itself on why this particular algorithm is useful as if this solves some general problem.