About neutral-200
#E5E5E5 is neutral-200, a tailwind v4. This page shows its rgb(229, 229, 229) / hsl(240, 0%, 89.8%) / oklch(0.9219 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.