Why Use CSS Filters?
CSS Filters (`blur`, `sepia`, `brightness`, etc.) allow you to conditionally manipulate images in real-time. This means you do not need to upload duplicate desaturated images. For example, you can render a grid of logos in grayscale, and use `:hover { filter: none; }` to reveal their true colors interactively.
Understanding Blend Modes
The `mix-blend-mode` property dictates how an element blends with the background beneath it. `Multiply` keeps dark tones and drops white (perfect for blending textures). `Screen` drops black and keeps highlights. This effectively mirrors Adobe Photoshop's layering controls within your DOM.
Performance Warning
Applying heavy `blur()` filters on large background images or fast-moving animated elements can cause dropped frame rates on slower mobile devices. Use these effects efficiently.