BugColorZilla!

bugzilla.mozilla.org.js

function textColor(bg) {
    var r = parseInt(bg.substr(0,2),16),
        g = parseInt(bg.substr(2,2),16),
        b = parseInt(bg.substr(4,2),16);
    var yiq = (r * 299 + g * 587 + b * 114) / 1000;
    return yiq >= 128 ? "black" : "white";
}

function bgColor(el, i) {
    return ("000000" + $.trim($("a", el).eq(i).text())).substr(-6);
}

var tds = $('.bz_id_column'),
    head = $('.bz_alias_short_desc_container'),
    start = 0,
    i;

function doChunk() {
    for (i=start; i<start+20; i++) {
        el = tds[i];
        if (!el) break;
        var c = bgColor(el, 0);
        $(el).css('background-color', "#" + c);
        $("a", $(el)).css('color', textColor(c));
    }
    start = i;
    if (i<tds.length)
        setTimeout(doChunk, 0);
}
if (tds.length) {
    doChunk();
}

if (head.length) {
    var c = bgColor(head, 1);
    $("body").css('background-color', "#" + c);
}