Useful color palettes: every pair ships with its WCAG contrast ratio. Pretty is easy — readable is useful.
Tap a swatch to copy its hex. Badges show the WCAG 2.x contrast ratio and grade (AAA ≥ 7 · AA ≥ 4.5 · AA-large ≥ 3). The 👁️ mark means the pair stays distinguishable under red-green colorblind simulation (heuristic approximation). 100% local — no network, no server.