About slate-50
#F8FAFC is slate-50, a tailwind v4. This page shows its rgb(248, 250, 252) / hsl(210, 40%, 98.04%) / oklch(0.9842 0.0034 247.86) 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.