[рони]

Блондинка,

var spans = [].slice.call(document.querySelectorAll('.colon'), 0);
            var colons =["hsl(0, 0%, 54%)", "hsl(0, 0%, 48%)", "hsl(0, 0%, 42%)", "hsl(0, 0%, 36%)", "hsl(0, 0%, 30%)", "hsl(0, 0%, 24%)", "hsl(0, 0%, 18%)", "hsl(0, 0%, 12%)", "hsl(0, 0%, 6%)", "hsl(0, 0%, 0%)"];
            step = 0;
            (function color()
            {
            spans.forEach(function(elem) {
            elem.style.color = colons[step];
              });
            step = ++step % colons.length;
            window.setTimeout(color, 100);
            })()