gistfile1.js

chroma('#bef').hcl();

function hcl(h, c, l) {
    var a = chroma.hcl(h, c, l).hcl()
    var dh = Math.abs(h - a[0])
    var dc = Math.abs(c - a[1])
    var dl = Math.abs(l - a[2])
    return [
        chroma.hcl(h, c, l),
        Math.sqrt(dh*dh + dc*dc + dl*dl),
        h,
        Math.max(dh, dc, dl),
    ]
}

var c = 10, l = 92;
hcl(17, c, l);
hcl(215, c, l);
hcl(227, c, l);
hcl(248, c, l);
hcl(270, c, l);

var colors = [], dists = 0, h = 0;
while (h < 360) {
    var color = hcl(h, c, l)
    colors.push(color[0]+'')
    dists += color[1]
    h += .1
}
dists/colors.length;

var hash = {};
colors.forEach(function(c) { hash[c] = 1 });
Object.keys(hash).length