JSFiddle - React, Tailwind, and code Playground

HTML

<div>

  наведи

</div>

CSS

* {
  box-sizing: border-box
}

html,
body {
  height: 100%;
  padding: 0;
  margin: 0;
}

div {
  width: 100px;
  height: 200px;
  padding: 10px;
  margin: 10px;
  background: linear-gradient(to bottom, red 50%, gray 50%);
}
div:hover {
  background: linear-gradient(15deg, red 50%, gray 50.5%);
}