About cyan-800
#005F78 is cyan-800, a tailwind v4. This page shows its rgb(0, 95, 120) / hsl(192.51, 99.78%, 23.55%) / oklch(0.451 0.0845 223.79) 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.