JSFiddle - React, Tailwind, and code Playground

HTML

<body>
    <form id="button1" action="#"method="post">
        <input type="submit" value="ORANGE"
            class="btn btn-warning" />
    </form>
</body>

CSS

.btn {
  display: inline-block;
  margin-bottom: 0;
  font-weight: normal;
  text-align: center;
  vertical-align: middle;
  -ms-touch-action: manipulation;
      touch-action: manipulation;
  cursor: pointer;
  background-image: none;
  border: 1px solid transparent;
  white-space: nowrap;
  padding: 7px 12px;
  font-size: 14px;
  line-height: 1.42857143;
  border-radius: 4px;
  -webkit-user-select: none;
  -moz-user-select: none;
  -ms-user-select: none;
  user-select: none;
}
.btn-warning {
  color: #ffffff;
  background-color: #ff851b;
  border-color: #ff7701;
}