Skip to content
Lizely

CSS Neumorphism Generator

Create a balanced soft-interface surface with validated color contrast, paired shadows, blur, distance, and corner radius, then copy the exact CSS.

Privacy: your files never leave your device. All processing happens locally in your browser.

How to use

  1. 1.Choose the surface color used by both the component and its surrounding area.
  2. 2.Adjust paired shadow distance, blur, and contrast.
  3. 3.Set the corner radius and inspect the raised preview.
  4. 4.Copy the CSS, then add semantic states, focus indication, and accessibility checks.

About CSS Neumorphism Generator

CSS Neumorphism Generator builds the paired shadows commonly used for a soft, raised interface surface. Choose one six-digit base color, the shadow distance, blur radius, contrast percentage, and corner radius. The tool derives a darker shadow and a lighter highlight by mixing the base channels toward black and white by the same percentage. It then places those colors on equal positive and negative offsets. The preview uses the exact background, radius, and box-shadow values returned in the copied CSS, so visual output and code share one calculation.

The effect depends on a close relationship between the element and its surrounding surface. A neumorphic card normally uses the same base color as its parent, allowing the two shadows to imply depth without a visible border. If the parent background differs, the element can look like an unrelated gray box. Copy the generated background to the intended surface or replace it with an existing design token that resolves to the same color. The generator produces a raised state only; inset controls, pressed states, focus rings, and disabled states need separate intentional rules.

Shadow distance sets both horizontal and vertical offsets. The dark shadow moves down and right, while the light highlight moves up and left. Blur softens both edges. Contrast controls how far each derived shadow color moves away from the base color, not opacity. Channel calculations are rounded to valid eight-bit hexadecimal values. A higher percentage creates stronger separation but can quickly stop looking subtle. Bounded values prevent negative lengths, non-finite numbers, incomplete colors, and extreme settings from entering the declaration. Empty numeric inputs are errors rather than silent zeroes.

Neumorphism has important accessibility limits. Low contrast is part of the visual style, but controls still need clear boundaries, readable labels, visible keyboard focus, and states that are not communicated only through shadow direction. A raised button and a pressed inset button may be difficult to distinguish for users with low vision. Test text and icons against the actual base color, add an explicit focus outline, and consider a border or stronger state indicator. Forced colors and high-contrast modes may discard decorative shadows, so the underlying semantic element and state must remain understandable.

Multiple large blurred shadows can increase paint cost, especially in scrolling lists or animated surfaces. Use the effect on a small number of stable elements, avoid animating blur continuously, and measure representative mobile devices. The generated rule does not add transitions, hover movement, typography, padding, or layout because those belong to the host component system. If a component changes elevation, prefer a short transform or tokenized shadow transition and respect reduced-motion preferences. Do not let decorative depth create layout shift or hide loading and error states.

All processing stays in the current browser tab. No value is uploaded or saved, no account is required, and no package is installed. The generator validates CSS-oriented ranges and produces deterministic colors, but it cannot certify contrast, visual hierarchy, browser rendering, or performance in a real product. Copy the rule into a test component, match the parent surface, add semantic HTML and focus behavior, inspect light and dark themes, zoom, forced colors, and mobile performance, then adjust design tokens rather than scattering one-off values.

Methodology & sources

Validates a six-digit base color and finite bounded geometry, mixes RGB channels symmetrically toward black and white by the selected contrast, and serializes paired positive and negative box shadows applied unchanged to the preview.

Frequently asked questions

Why does the surface look like a separate box?
Neumorphism usually relies on the component and parent sharing the same base color. A different parent breaks the soft-surface illusion.
Does this generate pressed or inset states?
No. It generates one raised state. Create pressed, focus, disabled, and error states separately and keep them distinguishable without shadows.
Is neumorphism accessible by default?
No. Low contrast can obscure boundaries and states. Add strong focus indicators, readable contrast, semantic controls, and high-contrast fallbacks.

Related tools

Developer Tools guides

View all