JSFiddle - React, Tailwind, and code Playground

HTML

<input type="text" class="field" name="s" value="" id="searchBox" placeholder="Search …" autocomplete="off">

CSS

#searchBox
{
    color:green;
}

#searchBox::-webkit-input-placeholder { /* WebKit browsers */
    color:    red;
}
#searchBox:-moz-placeholder { /* Mozilla Firefox 4 to 18 */
    color:    red;
}
#searchBox::-moz-placeholder { /* Mozilla Firefox 19+ */
    color:    red;
}
#searchBox:-ms-input-placeholder { /* Internet Explorer 10+ */
    color:    red;
}