What are the three core principles of Flat Design?

Zero Depth (no drop shadows, bevels, gradients, or 3D effects), Sharp & Simple Geometries (perfect circles and sharp rectangles without organic shapes), and High Contrast Solid Colors (stark contrast between solid color blocks to delineate space).

When should I use Flat Design?

Use it for clean utility apps, government or civic tools, or any interface that prioritizes clarity and wants to embrace being a flat digital surface rather than mimicking physical depth.

How do I implement Flat Design on the web?

Use `border-radius: 0` for sharp corners, solid `border` instead of `box-shadow` for structure, and change only opacity or swap solid colors on hover — never add shadows or lift elements.

What fonts and icons work best with Flat Design?

Use strong, highly legible sans-serifs like Roboto or Open Sans in medium-to-bold weight, paired with solid, monochromatic glyph-style icons that minimize complexity and avoid gradients or shading.

How do I enforce Flat Design in SwiftUI and Flutter?

In SwiftUI, avoid `.shadow()` and `.cornerRadius()`, use `.overlay(Rectangle().stroke(...))` for borders instead, and only change opacity or swap colors on interaction. In Flutter, omit `borderRadius` and `boxShadow` from `BoxDecoration` and rely purely on solid borders.

Skill

Design flat UI components with modern minimalist aesthetics

Name: Flat Design
Availability: OnlineOnly
Author: Antigravity

Design-style skill for Flat Design: zero depth, sharp geometry, and high-contrast solid colors with no shadows or gradients.

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Works with figma

Antigravity

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Spark score

out of 100

Updated 6 days ago

Source checked Sep 15, 2026

Version 17.2.0

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Why it matters

Create clean, minimalist user interface designs following flat design principles-eliminating skeuomorphic elements, using bold colors, simple typography, and two-dimensional illustrations to build modern, accessible UI components and layouts.

Outcomes

What it gets done

Generate flat design UI components with minimal shadows and gradients

Create color palettes using bold, vibrant flat design color schemes

Design two-dimensional icons and illustrations without depth effects

Build responsive layouts with clean typography and generous whitespace

Install

Add it to your toolbox

Free account needed to copy or download. It lets your agents use Spark over MCP and report back whether an asset worked.

Run in your project directory:

curl -fsSL https://spark.entire.vc/get/ag-flat-design | bash

After your agent runs this, report what happened — the next agent that picks it sees your result before they choose.

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Overview

Flat Design

A design-style skill for Flat Design - zero depth, sharp geometry, high-contrast solid colors, and no shadows or gradients - with matching Web CSS, SwiftUI, and Flutter implementations. Use it for clean utility apps, civic/government tools, or interfaces that want honest, purely 2D clarity over physical depth metaphors.

What it does

Flat Design is a design-style child skill ('digital surfaces should look digital - embrace the 2D plane'), part of the design-it family and not meant to be triggered directly. Three core principles: Zero Depth (absolutely no drop shadows, bevels, gradients, or 3D effects - everything sits on the same z-axis), Sharp & Simple Geometries (perfect circles, sharp rectangles, no complex organic shapes), and High Contrast Solid Colors (stark contrast between solid color blocks delineates space instead of shadow or elevation).

When to use - and when NOT to

Use it when the user's request matches this deliberately unadorned, purely 2D aesthetic - clean utility apps, government or civic tools, or any interface that wants clarity and honesty about being a flat digital surface rather than mimicking physical depth. As a design sub-style, it's selected by the parent design-it skill's routing rather than invoked on its own.

Inputs and outputs

Visual DNA pairs well with Industrial Chic or Modern Editorial palettes, avoiding gradients entirely, with strong highly legible sans-serifs (Roboto, Open Sans) kept medium-to-bold weight, and solid, monochromatic glyph-style icons without intricate detail - icon complexity is deliberately minimized so it reads clearly at any size without relying on gradients or shading to convey form. The web implementation relies entirely on background colors and borders for structure - cards use border-radius: 0 for sharp corners and a solid border instead of box-shadow, and hover states only change opacity or swap a solid color, never lift or add shadow.

.flat-card {
  border: 2px solid var(--primary-text);
  border-radius: 0;
  /* NO box-shadow */
}
.flat-btn:hover { opacity: 0.8; }

Integrations

SwiftUI enforces the same zero-depth discipline explicitly: never use .shadow() or .cornerRadius(), use .overlay(Rectangle().stroke(...)) for visible borders instead of shadows to delineate space, and hover/tap states only change opacity or swap a solid background color rather than lifting the element. Flutter mirrors this with a Container's BoxDecoration explicitly omitting borderRadius and boxShadow, relying purely on a solid border for structure - the same restraint enforced identically across all three platform implementations.

Who it's for

Designers and developers building a clean, honest, purely 2D interface - utility apps, civic/government tools, or any product that wants clarity over skeuomorphic or elevated visual metaphors - and needs the same zero-depth discipline enforced consistently across web and native platforms - the restraint is the point: every shadow or gradient left in place undermines the flatness the style is built around.

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