Get the colors that can be optimized on the w3's CSS2.1 color page

get-css21-color-min-candidates.js

// on http://www.w3.org/TR/CSS21/syndata.html
Array.prototype.forEach.call(document.querySelectorAll('span.colorsquare'), function(square) {
    var name = square.childNodes[0].innerText,
        hex = square.childNodes[1].data.trim();
    if (hex[1] === hex[2] && hex[3] === hex[4] && hex[5] === hex[6]) {
        hex = '#' + hex[1]+hex[3]+hex[5];
    }
    if (hex.length > name.length) {
        console.log(hex, '->', name);
    }
    else if (name.length > hex.length) {
        console.log (name, '->', hex);
    }
});
// then run, awk '{printf "    %-39s-> %s\n", tolower($1), tolower($3)}' < colors.css