Blur is a visual effect that softens the background or surrounding elements to bring focus to the foreground. It creates depth by separating layers of information, allowing the active content to stand out without fully hiding what lies beneath. When used thoughtfully, blur makes interactions feel smoother and more immersive.
The animation for blur often appears during transitions, such as when a modal, menu, or notification comes into view. Instead of simply dimming the background, the blur introduces a subtle sense of motion, suggesting that the interface is shifting into a new state. This keeps the user oriented while emphasizing the hierarchy of content.
Blur works best when it enhances clarity rather than obscures it. A well-balanced blur retains enough context so users remember what is behind, while still reducing distraction. If overused or too strong, it can make the interface feel heavy or disorienting. The key is to use it sparingly, in moments where focus is needed most.
To refine the effect, designers often pair blur with scaling, fading, or opacity changes, creating a layered transition that feels cohesive. The blur can also be animated dynamically, adjusting its intensity as the user interacts. These details give the effect a sense of life rather than appearing static.
Variations include background blur for modals and menus, foreground blur for overlays like glass effects, and interactive blur that changes based on scrolling or dragging. With careful tuning, blur becomes more than a stylistic choice, turning into a functional tool that guides attention and enhances the overall sense of depth.
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