::-webkit-input-placeholder { color: #f00; }
:-moz-placeholder { color: #f00; }
::-moz-placeholder { color: #f00; }
:-ms-input-placeholder { color: #f00; }

學無止境,教學相長
::-webkit-input-placeholder { color: #f00; }
:-moz-placeholder { color: #f00; }
::-moz-placeholder { color: #f00; }
:-ms-input-placeholder { color: #f00; }