About red-600
#E40016 is red-600, a tailwind v4. This page shows its rgb(228, 0, 22) / hsl(354.21, 100%, 44.71%) / oklch(0.5778 0.2357 27.39) 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.