About zinc-300
#D4D4D8 is zinc-300, a tailwind v4. This page shows its rgb(212, 212, 216) / hsl(240, 4.88%, 83.92%) / oklch(0.8711 0.0055 286.29) 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.