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Radius

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Radius in design refers to the curvature of corners in UI elements such as buttons, cards, input fields, and containers.

It’s a critical aspect of styling that can influence the overall feel of the interface—ranging from soft and friendly with larger radius to sharp and professional with smaller radius.

Proper use of radius enhances the visual appeal, contributes to a design’s consistency, and can improve user experience by making interfaces feel more approachable and modern.

Guidelines

Correct / Incorrect

Correct

An image showing nested rectangles with different radius. The parrent always have a bigger border radius.

Children elements must have a smaller border radius than their parent.

Incorrect

An image showing nested rectangles with different radius but without respecting the rule.

Children elements with a bigger border radius than their parent leads to a bad design and must be avoided.

Takeaways

  • By default, each element should have a border radius greater then 0

  • Element without border radius should not have children with border radius

Usage

Implementation

Properties

Radius

Type : CSS Variable

Border radius:
8px
Border radius:
16px
Border radius:
24px