About cyan-500
#00B6D4 is cyan-500, a tailwind v4. This page shows its rgb(0, 182, 212) / hsl(188.5, 99.75%, 41.62%) / oklch(0.7145 0.1263 215.12) 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.