input:-webkit-autofill,
input:-webkit-autofill:hover,
input:-webkit-autofill:focus,
input:-webkit-autofill:active {
-webkit-box-shadow: 0 0 0px 1000px #70808c inset !important;
}
http://stackoverflow.com/questions/2338102/override-browser-form-filling-and-input-highlighting-with-html-css