Check out this fork of D3 that features Lab conversion and different distance formulas https://github.com/jheer/d3/blob/master/d3.color.js https://github.com/jh

Check out this fork of D3 that features Lab conversion and different distance formulas https://github.com/jheer/d3/blob/master/d3.color.js https://github.com/jheer/d3/blob/master/d3.color.js