Rebecca Purple is the CSS named color #663399 — rgb(102, 51, 153), hsl(270, 50%, 40%). Its relative luminance is 0.075, giving 8.41:1 against white and 2.50:1 against black, so it works as a text color on white.
| HEX | #663399 |
|---|---|
| RGB | rgb(102, 51, 153) |
| HSL | hsl(270, 50%, 40%) |
| Relative luminance | 0.0749 |
| Contrast on white | 8.41:1 AA pass |
| Contrast on black | 2.50:1 AA fail |
Built by mixing rebeccapurple 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.
rebeccapurple is #663399, which is rgb(102, 51, 153) and hsl(270, 50%, 40%). It is one of the 148 CSS named colors defined by the CSS Color Module Level 4.
Rebecca Purple has a relative luminance of 0.075 on a 0–1 scale, so it is a dark color. Against white it scores 8.41:1; against black, 2.50:1.
rebeccapurple reaches 8.41:1 against white, which clears WCAG 2.2 AA for normal text (4.5:1) at any size.