Black is the CSS named color #000000 — rgb(0, 0, 0), hsl(0, 0%, 0%). Its relative luminance is 0.000, giving 21.00:1 against white and 1.00:1 against black, so it works as a text color on white.
| HEX | #000000 |
|---|---|
| RGB | rgb(0, 0, 0) |
| HSL | hsl(0, 0%, 0%) |
| Relative luminance | 0.0000 |
| Contrast on white | 21.00:1 AA pass |
| Contrast on black | 1.00:1 AA fail |
Built by mixing black 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.
black is #000000, which is rgb(0, 0, 0) and hsl(0, 0%, 0%). It is one of the 148 CSS named colors defined by the CSS Color Module Level 4.
Black has a relative luminance of 0.000 on a 0–1 scale, so it is a dark color. Against white it scores 21.00:1; against black, 1.00:1.
black reaches 21.00:1 against white, which clears WCAG 2.2 AA for normal text (4.5:1) at any size.