slate-900 — Tailwind v4.
WCAG 2.2 AA requires 4.5:1 for normal text and 3:1 for large text. Check any pair →
An 11-stop OKLCH ramp through slate-900 (the same engine as the theme builder). Click any stop to open its page.
Protanopia
Deuteranopia
Tritanopia
Achromatopsia
How slate-900 appears to viewers with each color-vision deficiency. Full simulator →
#0F172B is slate-900, a tailwind v4. This page shows its rgb(15, 23, 43) / hsl(222.86, 48.28%, 11.37%) / oklch(0.2084 0.0417 266.36) 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.