blue — CSS named color.
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 blue (the same engine as the theme builder). Click any stop to open its page.
Protanopia
Deuteranopia
Tritanopia
Achromatopsia
How blue appears to viewers with each color-vision deficiency. Full simulator →
#0000FF is blue, a css named color. This page shows its rgb(0, 49, 229) / hsl(227.28, 100%, 44.96%) / oklch(0.452 0.3132 264.05) 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.