Appearance

Because every state is derived rather than authored per screen, the palette, the history window, Settings and onboarding all move together. Changing the accent is one decision, not thirty.

#The built-in tints

Each tint is a pair, not a single colour — the gradient's two stops. Custom lets you pick any colour; Klippster builds the second stop from it and keeps the result readable.

#Surface style

How far the accent is allowed to spread, independent of which accent you chose.

#Light and dark are both real

Only the dark pair is authored. Light is derived in HSB and then re-checked against the same contrast rules, so neither mode is the afterthought that got shipped because someone remembered it late.

Windows follow macOS by default. You can pin either mode in Settings → Appearance.

#Readability is measured, not hoped for

This is the part that makes a custom colour picker safe to ship. WCAG relative luminance is computed across both gradient stops, and the colour is clamped until it clears the bar:

All 48 built-in combinations pass — seven tints plus custom, across three surface styles and two appearance modes. Settings shows the measured ratio and tells you whether the colour was accepted as picked or clamped to reach the threshold.

The foreground follows the same rule rather than a preference: Klippster prefers white on a fill while white still clears 3:1, and flips to dark ink only where white genuinely fails — which in practice is Amber, Teal and Graphite.

#First run checks its own work

Onboarding is five steps, and each one probes macOS for the real answer rather than trusting what you clicked — then tells you plainly what you ended up with. A Finder extension that is switched on in System Settings but has not actually loaded is reported as not loaded.