css
/* 
Style placeholder text
Original doc link: https://wpforms.com/developers/how-to-remove-confirmation-message-box-styling/
For support, please visit: https://www.facebook.com/groups/wpformsvip
*/
.wpforms-container ::-webkit-input-placeholder { /* Chrome and Safari */
   color: #aaa !important;
}
 
.wpforms-container :-moz-placeholder { /* Mozilla Firefox 4 to 18 */
   color: #aaa !important;
   opacity: 1 !important;
}
 
.wpforms-container ::-moz-placeholder { /* Mozilla Firefox 19+ */
   color: #aaa !important;
   opacity: 1 !important;
}
 
.wpforms-container :-ms-input-placeholder { /* Internet Explorer 10-11 */
   color: #aaa !important;
}
 
.wpforms-container ::-ms-input-placeholder { /* Microsoft Edge */
   color: #aaa !important;
}
 
.wpforms-container ::placeholder {
   color: #aaa !important;
}