JSFiddle - React, Tailwind, and code Playground

HTML

<button class="z-button-os">Show Textbox Values</button>

CSS

.z-button-os {
    background-color: #3F71C9;
    border-bottom: 1px solid black;
    border-right: 1px solid black;
    color: #FFFFFF;
    cursor: pointer;
    font: 8pt Sans-serif;
    padding: 1px 6px 0;
    height:30px;
}