Crimson is the CSS named color #DC143C — rgb(220, 20, 60), hsl(348, 83%, 47%). Its relative luminance is 0.160, giving 4.99:1 against white and 4.21:1 against black, so it works as a text color on white.
| HEX | #DC143C |
|---|---|
| RGB | rgb(220, 20, 60) |
| HSL | hsl(348, 83%, 47%) |
| Relative luminance | 0.1604 |
| Contrast on white | 4.99:1 AA pass |
| Contrast on black | 4.21:1 large text only |
Built by mixing crimson toward white (four steps) and toward black (four steps) while keeping the hue. Use the shades generator for a different step count or to add harmony sets.
Closest by CIELAB distance (ΔE76). For perceptual matching in a design system, compare in OKLab before locking a token.
crimson is #DC143C, which is rgb(220, 20, 60) and hsl(348, 83%, 47%). It is one of the 148 CSS named colors defined by the CSS Color Module Level 4.
Crimson has a relative luminance of 0.160 on a 0–1 scale, so it is a dark color. Against white it scores 4.99:1; against black, 4.21:1.
crimson reaches 4.99:1 against white, which clears WCAG 2.2 AA for normal text (4.5:1) at any size.