What is the difference between flat, concave, convex, and pressed?

Flat gives an element a uniformly raised, embossed surface. Concave curves the surface inward like a shallow bowl. Convex curves it outward like a dome. Pressed uses inset shadows to make the element look pushed into the background — the standard treatment for an active or clicked button state.

Why does neumorphism require the background and element to share a color?

The whole illusion depends on the element looking like it is made of the exact same material as the surface behind it, distinguished only by shadow. If the element color differs noticeably from the background, the shadows read as ordinary drop shadows around a distinct box rather than a soft extrusion of the same surface.

Is neumorphism accessible for users with visual impairments?

Not by default. Because contrast between the element and background is intentionally low — that is what creates the soft, blended look — text and icons inside neumorphic elements can fail WCAG contrast requirements. Always verify text contrast separately and add a visible focus ring for keyboard and screen-reader users, since the shadow effect alone will not signal an active focus state.

Why does my neumorphic effect look muddy or too dark?

This usually means the intensity value is too high relative to how light or dark your base color already is. Very light base colors (near white) can tolerate high intensity, but mid-tone or dark base colors need a lower intensity value or the dark shadow variant clips to near-black and the light shadow barely shows.

Can I use neumorphism on a dark theme?

Yes, but you need a separate base color and shadow calculation for dark mode — the same light/dark shadow ratio that works on a light gray background will look wrong on a near-black one. Generate a second CSS block using a dark base color rather than trying to invert one light-mode block with a CSS filter.

Does neumorphism work well for buttons with a lot of text?

It works best for short-label buttons, icon buttons, toggles, and cards rather than long paragraphs of body text, since the low-contrast surface it produces is not ideal for extended reading.

What is the difference between neumorphism and glassmorphism?

Neumorphism simulates a solid, molded surface using dual box-shadows and no transparency. Glassmorphism simulates a frosted glass panel using backdrop-blur and semi-transparent backgrounds layered over other content. They are visually distinct styles that are sometimes combined but rely on entirely different CSS properties.

Can I animate the transition between flat and pressed states?

Yes — transition the box-shadow property with a short duration (150–250ms) in your CSS, and toggle between the flat shadow values and the inset pressed values on :active or a click-triggered class. Both value sets are available from this generator by switching the Shape control.

Does this generator support border and outline styling too?

The generator focuses on the box-shadow, background, and border-radius properties that define the neumorphic effect itself. Borders are intentionally omitted from the output since a hard border undermines the soft, borderless look the style is meant to achieve.

Neumorphism Generator — Free Soft UI CSS Shadow Generator Online

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Controls

Base Color

Shape

Distance10px

Blur20px

Intensity40

Border Radius16px

Preview

🎯flat

Generated CSS

.element {
  border-radius: 16px;
  background: #e0e5ec;
  box-shadow: 10px 10px 20px rgb(184, 189, 196), -10px -10px 20px rgb(255, 255, 255);
}

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What is Neumorphism Generator?

Neumorphism Generator is a free online CSS tool for building the soft-UI (neumorphism) shadow effect with precise, numeric control over every parameter that makes it work: base color, shadow distance, blur radius, shadow intensity, corner radius, and element shape. Drag a slider and the preview and the generated CSS update in the same frame — no build step, no design software, no guesswork on the color math.

Neumorphism, sometimes written "neumorphism" as a portmanteau of "new" and "skeuomorphism," became popular around 2019–2020 as a reaction against flat design's total lack of depth. Instead of drop shadows floating an element above the page, neumorphism makes an element look like it is molded out of the same material as its background — pressed, embossed, or extruded from a single continuous surface. It achieves this using nothing but two offsetting box-shadows: one lighter shadow positioned toward the simulated light source (usually top-left) and one darker shadow positioned opposite it (bottom-right). The eye reads that light/dark pairing as physical depth the same way it reads shading on a real embossed surface.

The part that trips people up when they try to hand-code this in CSS is that the three colors involved — the background surface, the light shadow, and the dark shadow — cannot be picked independently. They have to be derived from one shared base hue: the light shadow is that hue pushed brighter, the dark shadow is the same hue pushed darker, and the element itself typically matches the surface color exactly. Get that math even slightly wrong and the soft, molded look collapses into an ordinary, ugly double-shadow. This generator removes that failure point entirely — pick one base color and it computes correctly balanced light and dark shadow values automatically, in RGB, scaled by the intensity slider you set.

Four shape modes cover the situations neumorphism actually gets used for in real interfaces: flat (a raised, embossed surface — good for cards and idle buttons), convex (a domed, outward curve — good for toggle knobs and prominent CTAs), concave (an inward curve — good for wells, inputs, and progress tracks), and pressed (an inset, sunken look created with inset box-shadow — the standard way to represent an active or clicked state). Because the tool renders all four states live, you can design a button's entire idle-to-pressed interaction sequence without writing a single line of CSS until you are satisfied with how it looks.

How It Works

The generator parses your chosen base color into RGB, then computes a lightened variant (channel values pushed up) and a darkened variant (channel values pushed down) by the amount set on the Intensity slider — this produces the two colors used in the dual box-shadow. Distance and Blur control the offset and blur-radius arguments of each shadow. Shape mode changes how those shadows are applied: flat and pressed use solid backgrounds with outer or inset shadows respectively, while concave and convex additionally layer a subtle linear-gradient background running in the opposite direction from the shadow pair, which is what sells the curved-surface illusion rather than a flat raised block. Every slider change re-runs this calculation instantly so the preview and the CSS output panel never fall out of sync.

How to Use

Pick a base color

Select the color that will be used for both the element and the surrounding surface — this single color drives every shadow calculation.

Choose a shape mode

Select flat, concave, convex, or pressed depending on whether you are designing a raised card, a domed control, an inset well, or an active/clicked state.

Adjust distance and blur

Use the Distance slider to set how far the shadow is offset from the element, and Blur to control how soft or sharp the shadow edge appears.

Set the intensity

Intensity controls how strongly the light and dark shadow variants diverge from your base color — lower values give a subtle effect, higher values give a bolder, more dramatic depth.

Fine-tune the border radius

Adjust corner rounding to match your existing design system — sharper radii suit dashboards, larger radii suit consumer app UI.

Copy the CSS

Click Copy CSS to grab the complete box-shadow, background, and border-radius block, ready to paste directly into your stylesheet or component.

Who Uses This Tool

🔘

Button States

Design pressed/raised button states that react naturally to click interactions.

🎛️

Control Panels

Create dashboard knobs, toggles, and sliders with tactile soft-UI styling.

🃏

Cards & Panels

Give content cards a raised, physical-looking depth without heavy drop shadows.

📱

Mobile Components

Style iOS/Android-inspired inputs, switches, and list items with soft UI shadows.

🖥️

Design Systems

Generate consistent shadow values to document in your team design system tokens.

🎨

Prototyping

Rapidly test different depth and shape combinations before committing to a design.

Why Choose This Tool

Auto Shadow Math

Light and dark shadow colors are automatically derived from your base color — no manual hex tweaking.

Four Shape Modes

Flat, concave, convex, and pressed cover every neumorphic state you need for interactive elements.

Complete CSS Output

Generated code includes box-shadow (both directions), background-color, and border-radius in a single ready-to-paste block.

Live Preview

Preview updates instantly as you move sliders so you can fine-tune without guessing.

No External Dependencies

The effect is pure CSS — no JavaScript, no libraries needed in your implementation.

Privacy First

All computation runs in your browser — no data is sent to any server.

Key Benefits

Four shape modes: flat, concave, convex, and pressed

Automatic light/dark shadow color computation from a single base color

Full independent control over distance, blur, intensity, and corner radius

Live preview updates in real time as you drag any slider

Copy clean, ready-to-paste CSS box-shadow and background code instantly

No manual RGB math or trial-and-error hex tweaking required

Pure CSS output — no JavaScript, no external library dependency

Runs entirely client-side with no account or sign-up needed

Frequently Asked Questions

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Neumorphism Generator

What is Neumorphism Generator?

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How to Use

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Why Choose This Tool

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