JSFiddle - React, Tailwind, and code Playground

HTML

<input class="infoPlaceholder" name="firstName" placeholder="First Name" />

CSS

.infoPlaceholder::-webkit-input-placeholder {
    font-weight: lighter;
    color:#AFB2B3;
}
.infoPlaceholder::-moz-placeholder {
    font-weight: lighter;
    color:#AFB2B3;
}
.infoPlaceholder::-ms-input-placeholder {
    font-weight: lighter;
    color:#AFB2B3;
}