White is the CSS named color #FFFFFF — rgb(255, 255, 255), hsl(0, 0%, 100%). Its relative luminance is 1.000, giving 1.00:1 against white and 21.00:1 against black, so it works as a text color on black.
| HEX | #FFFFFF |
|---|---|
| RGB | rgb(255, 255, 255) |
| HSL | hsl(0, 0%, 100%) |
| Relative luminance | 1.0000 |
| Contrast on white | 1.00:1 AA fail |
| Contrast on black | 21.00:1 AA pass |
Built by mixing white 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.
white is #FFFFFF, which is rgb(255, 255, 255) and hsl(0, 0%, 100%). It is one of the 148 CSS named colors defined by the CSS Color Module Level 4.
White has a relative luminance of 1.000 on a 0–1 scale, so it is a light color. Against white it scores 1.00:1; against black, 21.00:1.
white reaches 21.00:1 against black, which clears WCAG 2.2 AA for normal text (4.5:1) at any size.