As a site or application grows, the challenge is no longer just creating new visual elements, but keeping them consistent with one another. That is exactly what a design system is for — a shared library of components and rules, too often seen as a luxury reserved for large organisations.
The problem a design system solves
Without a shared reference, each new page or feature tends to reinvent its own buttons, spacing and colours. The result: a visually fragmented interface, accumulating inconsistencies, and development time that grows as the site expands.
What it changes in practice
A design system centralises style decisions — typography, colours, interface components — into a single reference, reusable from one project to the next. Each new page builds on already validated elements, reducing back-and-forth and speeding up delivery without sacrificing visual consistency.
The line not to cross
A design system only has value if it stays alive. Too rigid, it stifles innovation; poorly documented, it falls out of use as soon as the team changes. The challenge, then, is not creating it, but keeping it aligned with the product’s real needs.
Our position
At Web Harmonie, we only recommend a design system when the project’s structure genuinely justifies it — a showcase site doesn’t need one, an evolving platform does. It’s this sense of proportion, more than the tool itself, that makes the difference.
Further reading
Related reading: Digital architecture: two years of observations and No-code, low-code or custom development: choosing the right approach.