Allows you to "blend" HTML, SVG elements, and backgrounds, using effects like "multiply", "darken", "luminosity", etc. that are common in graphics editors.
The mix-blend-mode and background-blend-mode properties on W3C.
The images below (one inline, one background) are altered using CSS blending modes.
Can I Use css-mixblendmode? Data on support for the blending-modes feature across the major browsers from caniuse.com.