Slate Grey is the CSS named color #708090 — rgb(112, 128, 144), hsl(210, 13%, 50%). Its relative luminance is 0.209, giving 4.05:1 against white and 5.18:1 against black, so it works as a text color on black.
| HEX | #708090 |
|---|---|
| RGB | rgb(112, 128, 144) |
| HSL | hsl(210, 13%, 50%) |
| Relative luminance | 0.2090 |
| Contrast on white | 4.05:1 large text only |
| Contrast on black | 5.18:1 AA pass |
Built by mixing slategrey 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.
slategrey is #708090, which is rgb(112, 128, 144) and hsl(210, 13%, 50%). It is one of the 148 CSS named colors defined by the CSS Color Module Level 4.
Slate Grey has a relative luminance of 0.209 on a 0–1 scale, so it is a dark color. Against white it scores 4.05:1; against black, 5.18:1.
slategrey reaches 5.18:1 against black, which clears WCAG 2.2 AA for normal text (4.5:1) at any size.