About indigo-50
#EEF2FF is indigo-50, a tailwind v4. This page shows its rgb(238, 242, 255) / hsl(225.88, 100%, 96.67%) / oklch(0.9619 0.0179 272.31) 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.