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CSS does not currently support this feature. You can create your own or use a plugin that emulates this behavior using DIVs / CSS.
However, you can achieve this using Javascript, which you can see here.
var sel = document.getElementById('select_id'); sel.addEventListener('click', function(el){ var options = this.children; for(var i=0; i < this.childElementCount; i++){ options[i].style.color = 'white'; } var selected = this.children[this.selectedIndex]; selected.style.color = 'red'; }, false);
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