JSFiddle - React, Tailwind, and code Playground

HTML

<body>

<div class="one">
    <div class="two"></div>
</div>

</body>

CSS

.one    {
    width: 200px;
    height: 200px;
    background-color: #902326;
}

.two    {
    width: 100px;
    height: 100px;
    border: 3px solid black;
    border-radius: 20px;
    margin: auto;

    background: #3b679e; /* Old browsers */
    background: -moz-linear-gradient(top, #3b679e 0%, #2b88d9 50%, #207cca 51%, #7db9e8 100%); /* FF3.6+ */
    background: -webkit-gradient(linear, left top, left bottom, color-stop(0%,#3b679e), color-stop(50%,#2b88d9), color-stop(51%,#207cca), color-stop(100%,#7db9e8)); /* Chrome,Safari4+ */
    background: -webkit-linear-gradient(top, #3b679e 0%,#2b88d9 50%,#207cca 51%,#7db9e8 100%); /* Chrome10+,Safari5.1+ */
    background: -o-linear-gradient(top, #3b679e 0%,#2b88d9 50%,#207cca 51%,#7db9e8 100%); /* Opera 11.10+ */
    background: -ms-linear-gradient(top, #3b679e 0%,#2b88d9 50%,#207cca 51%,#7db9e8 100%); /* IE10+ */
    background: linear-gradient(to bottom, #3b679e 0%,#2b88d9 50%,#207cca 51%,#7db9e8 100%); /* W3C */
    filter: progid:DXImageTransform.Microsoft.gradient( startColorstr='#3b679e', endColorstr='#7db9e8',GradientType=0 ); /* IE6-9 */
}