Hello,
Try to add the below code to change the placeholder text color
input::-webkit-input-placeholder,input.form-control::-webkit-input-placeholder {
color: #fff;
}
input:-moz-placeholder,input.form-control:-moz-placeholder {
color: #fff;
}
input::-moz-placeholder,input.form-control::-moz-placeholder {
color: #fff;
}
input:-ms-input-placeholder,input.form-control:-ms-input-placeholder {
color: #fff;
}
Regards