JSFiddle - React, Tailwind, and code Playground

HTML

<div class="buttonToolbar">
    <input type="text" placeholder="e.g. Stackoverflow"><br>
</div>

CSS

.buttonToolbar input {
    color: Blue;
}
:-ms-input-placeholder { /* Internet Explorer 10+ */
    font-style: italic;
    color: GrayText;
}
::-webkit-input-placeholder { /* WebKit browsers */
	 font-style: italic;
     color: GrayText;
}