Medium Slate Blue is the CSS named color #7B68EE — rgb(123, 104, 238), hsl(249, 80%, 67%). Its relative luminance is 0.203, giving 4.15:1 against white and 5.06:1 against black, so it works as a text color on black.
| HEX | #7B68EE |
|---|---|
| RGB | rgb(123, 104, 238) |
| HSL | hsl(249, 80%, 67%) |
| Relative luminance | 0.2028 |
| Contrast on white | 4.15:1 large text only |
| Contrast on black | 5.06:1 AA pass |
Built by mixing mediumslateblue 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.
mediumslateblue is #7B68EE, which is rgb(123, 104, 238) and hsl(249, 80%, 67%). It is one of the 148 CSS named colors defined by the CSS Color Module Level 4.
Medium Slate Blue has a relative luminance of 0.203 on a 0–1 scale, so it is a dark color. Against white it scores 4.15:1; against black, 5.06:1.
mediumslateblue reaches 5.06:1 against black, which clears WCAG 2.2 AA for normal text (4.5:1) at any size.