Try this CSS:
input::-webkit-input-placeholder {
/* Chrome/Opera/Safari */
color: #ddd;
}
input::-moz-placeholder {
/* Firefox 19+ */
color: #ddd;
}
input:-ms-input-placeholder {
/* IE 10+ */
color: #ddd;
}
input:-moz-placeholder {
/* Firefox 18- */
color: #ddd;
}
