By Series B, your product surface has multiplied — new modules, new tenants, new compliance surfaces. If every team has been improvising components, you are carrying design debt that compounds exactly as fast as your headcount.
Tokens are the audit trail
A real design system is not a folder of components; it is a contract. Every color resolves through a token with known contrast behavior, so accessibility is answered once, at the boundary, instead of in a thousand instances.
ts
// One token map the whole product resolves through.
const sev = { critical: 'var(--sev-critical)', high: 'var(--sev-high)' };
// Change it once; every surface stays consistent and auditable.You do not pass an enterprise review with heroics. You pass it because the right behavior was already everywhere, by default.
- Consistency that survives new hires — the system encodes the decisions so people cannot quietly diverge.
- Velocity that goes up, not down, as the product grows.
- A review story you can actually tell an assessor: here is where every rule lives.
The best time to build it was your seed round. The second best time is before the Series B diligence team opens your Figma.
