red — 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 red (the same engine as the theme builder). Click any stop to open its page.
Protanopia
Deuteranopia
Tritanopia
Achromatopsia
How red appears to viewers with each color-vision deficiency. Full simulator →
#FF0000 is red, a css named color. This page shows its rgb(255, 0, 0) / hsl(0, 100%, 50%) / oklch(0.628 0.2577 29.23) 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.