CSS Blend Modes is a feature of CSS that allows you to blend two elements together to create a unique visual effect. It enables you to create a variety of effects, such as transparency, color blending, and more. With CSS Blend Modes, you can create stunning visuals that will make your website
From Wikipedia
Blend modes in digital image editing and computer graphics are used to determine how two layers are blended with each other. The default blend mode in most applications is simply to obscure the lower layer by covering it with whatever is present in the top layer ; because each pixel has numerical values, there also are many other ways to blend two layers.