#design — Visual and technical design rules for QR codes that look distinctive without breaking the scan
3 posts tagged #design.
A QR code is a constraint satisfaction problem dressed up as a design surface. The decoder needs at minimum 50% cell coverage, a clean centre on each module, a 4-module quiet zone, error correction that absorbs print damage, and finder patterns the camera can lock onto from a distance. Inside those constraints the design space is wider than people assume — and outside them, the most striking-looking codes quietly fail in production.
These posts cover the visual + technical design rules. Round modules vs square. Custom shapes (diamonds, leaves, brand-mark pixels) and which actually scan. Logo overlays — how big is too big. Contrast ratios for brand colours. Scan-distance math for outdoor codes. The five-constraint checklist every code should clear before going to print.
If you're a designer building QR codes that need to survive real-world conditions, or a brand evaluating what's actually possible, these posts are the version that respects both the design intent and the engineering reality.
Round QR codes — what actually makes them work
Round QR codes look great on packaging and posters but only scan reliably when the underlying code is built right. Here's what changes and what doesn't.
QR codes outdoors — billboards, bus stops, signage
Outdoor QR codes follow different rules than indoor ones. Scan distance, surface materials, daylight, weather. Here's what to size, print, and test for an outdoor QR code.
How to design a custom QR code that actually scans
Branded QR codes — round modules, custom colours, centre logo — work when you respect five constraints. Here's the recipe and the things that quietly break the scan.