Build dual colour schemes, maintain brand consistency, and respect user preferences with CSS custom properties and intelligent theme switching
When you use CSS custom properties correctly, adding new colours becomes trivial. Your entire design system updates instantly across both light and dark modes without touching a single HTML file.
Most teams hardcode hex values everywhere. That’s the path to inconsistency. We’ll show you the structure that actually scales.
Learn About Variables
Your brand shouldn’t feel like two different brands depending on what mode someone uses. It’s harder than you think to get this right, especially with text contrast requirements.
We cover the exact techniques to maintain visual hierarchy, colour relationships, and brand personality in both light and dark contexts. Including bilingual content considerations for Hong Kong and beyond.
Read Design GuideThe prefers-color-scheme media query lets you detect what someone’s system is set to. Dark mode users should see dark by default. Light mode users should see light. Simple concept. Harder to implement well.
Combine system detection with manual toggle controls so users can override their preference if they want. We’ll show you the exact implementation pattern that works across all modern browsers.
Implementation Guide
Everything you need to know to build a professional theme system
Design light and dark themes that feel intentional. Maintain brand consistency, readability standards, and visual hierarchy across both modes with specific proven techniques.
Organize theme colours using CSS custom properties. Learn the scalable structure that makes theme switching simple and keeps maintenance manageable as your design system grows.
Use prefers-color-scheme media queries to automatically detect system preferences. Combine with manual toggle controls to give users full control over their experience.
Hardcoded hex colours scattered everywhere
Light mode works fine, dark mode feels off
Contrast fails WCAG AA in one mode
Updating colours means searching code
No system preference detection
All colours in :root, easy to update
Both modes feel equally polished
WCAG AA contrast verified in both
Change one variable, entire system updates
Respects prefers-color-scheme by default
What proper dark mode implementation looks like in practice
Of users prefer respecting their system preference
Minimum contrast ratio for readable text
Complete colour palettes (light + dark)
Possible combinations with CSS variables
Major platforms adopt dark mode. Users expect it as standard, not optional.
Browser support for CSS custom properties becomes reliable across all modern browsers.
Web accessibility standards become non-negotiable for professional sites.
Expect dark mode as baseline feature. Sites without it lose credibility.
Beyond light/dark: seasonal themes, high contrast variants, and custom user themes.
We’ve helped dozens of Hong Kong companies implement dark mode properly. From fintech platforms to e-commerce sites, we understand the unique challenges of bilingual, culturally-aware design.
WCAG AA Certified
Web Design Excellence
Accessibility Standard
Hong Kong Tech Leader
Deep dives into theme implementation from our comprehensive collection
Learn how to design light and dark themes that feel intentional, not like an afterthought. Includes specific techniques for maintaining brand consistency across both modes while respecting readability standards.
Read Guide
Organize all your theme colours using CSS variables. We’ll show you the structure that scales well and makes theme switching simple — even when you add new colours later.
Read Guide
Detect and respect your users’ system colour preferences automatically. This guide covers the media query syntax, browser support, and how to combine it with manual toggle controls for the best experience.
Read GuideWe’ve put together everything you need to design and build dual colour schemes that maintain brand consistency, respect user preferences, and pass accessibility standards. Start with our guides or reach out to discuss your specific implementation.
