<article style="--custom_color: pink">
	<h2>This is a blog post</h2>
	<p>Try hovering over this card!</p>
</article>
<article style="--custom_color: orange">
	<h2>Here's another blog post</h2>
	<p>It has an introduction!</p>
</article>
<article style="--custom_color: lightblue">
	<h2>Blog post number three</h2>
	<p>It has an introduction!</p>
</article>
<article style="--custom_color: lightgreen">
	<h2>And another one</h2>
	<p>It has an introduction!</p>
</article>

body {
	padding: 1rem;
	font-family: sans-serif;
}
article {
	padding: 2rem;
	margin-bottom: 1rem;
	cursor: pointer;
	background: lightgray;
	transition: 100ms;
	&:hover {
		background: var(--custom_color);
	}
}
h2 {
	font-size: 1.8rem;
	margin-bottom: 0.5rem;
}