CSS Darken animation effect

CSS Darken animation

The darken CSS effect can be achieved by animating the CSS filter function filter#brightness from 100% to zero.

<style>
.darken {
	/* Uncomment as needed. */
	/* width: 100px; */
	/* height: 100px; */
	/* background-color: deeppink; */
	animation-name: darken;
	animation-duration: 4s;
	animation-iteration-count: infinite;	
}
			
@keyframes darken {
	/* 0% {  } */
	100% { filter: brightness(0); }		
}
</style>

Hints:

If you cannot see your HTML element when using our code, you may need to set a width and or height, or background on your target HTML element using CSS. Just uncomment the CSS properties in our code as needed.
Remove the HTML style tag as needed.
Change values in the code such as animation-duration as needed.

Animation effects source code licenced under MIT Licence