JSFiddle - React, Tailwind, and code Playground

HTML

<div class="arrow">
    <select name="day" id="day" required="required">
        <option></option>
        <option value="1">1</option>
        <option value="2">2</option>
    </select>
</div>

CSS

select {
    width: 100px;
    margin: 0;
    background-color: #FFFEFD;
    border: solid 1px #F15922;
    color: #000;
    outline:none;
    display: inline-block;
    -webkit-appearance:none;
    -moz-appearance:none;
    appearance:none;
    cursor:pointer;
}
.arrow {
    position:relative
}
.arrow:after {
    content:'';
    font: 1em"Consolas", monospace;
    width: 0;
    height: 0;
    position: absolute;
    right:8px;
    top:50%;
    padding: 0 0 -25% 0;
    margin-right: 3px;
    border-width: 8px 0 8px 8px;
    border-style: solid;
    border-color: transparent #F15922;
    pointer-events:none;
}

.arrow:before {
    content:'';
    right:6px;
    top:0px;
    width:20px;
    height:20px;
    position:absolute;
    pointer-events:none;
    display:block;
}