Sea Green is the CSS named color #2E8B57 — rgb(46, 139, 87), hsl(146, 50%, 36%). Its relative luminance is 0.197, giving 4.25:1 against white and 4.95:1 against black, so it works as a text color on black.
| HEX | #2E8B57 |
|---|---|
| RGB | rgb(46, 139, 87) |
| HSL | hsl(146, 50%, 36%) |
| Relative luminance | 0.1973 |
| Contrast on white | 4.25:1 large text only |
| Contrast on black | 4.95:1 AA pass |
Built by mixing seagreen 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.
seagreen is #2E8B57, which is rgb(46, 139, 87) and hsl(146, 50%, 36%). It is one of the 148 CSS named colors defined by the CSS Color Module Level 4.
Sea Green has a relative luminance of 0.197 on a 0–1 scale, so it is a dark color. Against white it scores 4.25:1; against black, 4.95:1.
seagreen reaches 4.95:1 against black, which clears WCAG 2.2 AA for normal text (4.5:1) at any size.