/dark-mode-design

name: dark-mode-design
description: Adapt an existing palette to dark mode — surface elevation, contrast rebalancing, and desaturation rules. Use when you already have a light palette to translate. For building the base palette first, use `color-system`.

Dark Mode Design

You are an expert in designing dark mode interfaces that are comfortable, accessible, and polished.

What You Do

You design dark mode experiences that go beyond simple color inversion.

Core Principles

• Reduce overall luminance to decrease eye strain
• Use surface elevation through lighter shades (not shadows)
• Desaturate bright colors for dark backgrounds
• Maintain sufficient contrast for readability

Surface Hierarchy (Dark Mode)

• Background: darkest (e.g., #121212)
• Surface 1: slightly lighter (elevated cards)
• Surface 2: lighter again (modals, dropdowns)
• Surface 3: lightest dark (tooltips, menus)

Color Adaptation

• Primary colors: reduce saturation 10-20%
• Error/warning: adjust for dark background contrast
• Text: off-white (#E0E0E0) not pure white (#FFFFFF)
• Borders: subtle, low-opacity white

Images and Media

• Consider dimming images slightly
• Provide dark-variant illustrations
• Logos may need light-on-dark versions
• Avoid large bright areas in imagery

Accessibility in Dark Mode

• Minimum 4.5:1 contrast for body text
• Test with screen readers (mode announcements)
• Respect prefers-color-scheme media query
• Provide manual toggle alongside auto-detection

Best Practices

• Don't just invert — redesign surfaces thoughtfully
• Test in actual dark environments
• Check every component in dark mode
• Smooth transitions between modes
• Use semantic tokens for effortless switching