About gray-300
#D1D5DC is gray-300, a tailwind v4. This page shows its rgb(209, 213, 220) / hsl(218.18, 13.58%, 84.12%) / oklch(0.872 0.0106 261.79) 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.