Spring Green is the CSS named color #00FF7F — rgb(0, 255, 127), hsl(150, 100%, 50%). Its relative luminance is 0.731, giving 1.35:1 against white and 15.61:1 against black, so it works as a text color on black.
| HEX | #00FF7F |
|---|---|
| RGB | rgb(0, 255, 127) |
| HSL | hsl(150, 100%, 50%) |
| Relative luminance | 0.7305 |
| Contrast on white | 1.35:1 AA fail |
| Contrast on black | 15.61:1 AA pass |
Built by mixing springgreen 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.
springgreen is #00FF7F, which is rgb(0, 255, 127) and hsl(150, 100%, 50%). It is one of the 148 CSS named colors defined by the CSS Color Module Level 4.
Spring Green has a relative luminance of 0.731 on a 0–1 scale, so it is a light color. Against white it scores 1.35:1; against black, 15.61:1.
springgreen reaches 15.61:1 against black, which clears WCAG 2.2 AA for normal text (4.5:1) at any size.