About neutral-300
#D4D4D4 is neutral-300, a tailwind v4. This page shows its rgb(212, 212, 212) / hsl(0, 0%, 83.14%) / oklch(0.8699 0 0) 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.