<div></div>
div {
	height: calc(100vh - 1em);
	background: 
		var(--map, 
			linear-gradient(#888, #fff)), 
		var(--pattern, 
			radial-gradient(closest-side, #777, #fff) 0/ 1em 1em space);
	background-blend-mode: multiply;
	filter: contrast(21)
}
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