Green Yellow is the CSS named color #ADFF2F — rgb(173, 255, 47), hsl(84, 100%, 59%). Its relative luminance is 0.806, giving 1.23:1 against white and 17.12:1 against black, so it works as a text color on black.
| HEX | #ADFF2F |
|---|---|
| RGB | rgb(173, 255, 47) |
| HSL | hsl(84, 100%, 59%) |
| Relative luminance | 0.8061 |
| Contrast on white | 1.23:1 AA fail |
| Contrast on black | 17.12:1 AA pass |
Built by mixing greenyellow 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.
greenyellow is #ADFF2F, which is rgb(173, 255, 47) and hsl(84, 100%, 59%). It is one of the 148 CSS named colors defined by the CSS Color Module Level 4.
Green Yellow has a relative luminance of 0.806 on a 0–1 scale, so it is a light color. Against white it scores 1.23:1; against black, 17.12:1.
greenyellow reaches 17.12:1 against black, which clears WCAG 2.2 AA for normal text (4.5:1) at any size.