About slate-100
#F1F5F9 is slate-100, a tailwind v4. This page shows its rgb(241, 245, 249) / hsl(210, 40%, 96.08%) / oklch(0.9683 0.0069 247.9) values, WCAG contrast against black and white, an OKLCH tint-and-shade ramp, and complementary, analogous, and triadic harmonies — all computed in perceptually-uniform OKLCH.