JSFiddle - React, Tailwind, and code Playground

HTML

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

CSS

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