::placeholder {
      opacity: 1 !important;
}
::-webkit-input-placeholder {
    opacity: 1 !important; /* for older chrome versions. may no longer apply. */
}

:-moz-placeholder { /* Firefox 18- */
    opacity: 1 !important;
}

::-moz-placeholder {  /* Firefox 19+ */
    opacity: 1 !important;
}

:-ms-input-placeholder {  
   color: #ffffff;
  opacity: 1 !important;
}