Medium Blue is the CSS named color #0000CD — rgb(0, 0, 205), hsl(240, 100%, 40%). Its relative luminance is 0.044, giving 11.16:1 against white and 1.88:1 against black, so it works as a text color on white.
| HEX | #0000CD |
|---|---|
| RGB | rgb(0, 0, 205) |
| HSL | hsl(240, 100%, 40%) |
| Relative luminance | 0.0441 |
| Contrast on white | 11.16:1 AA pass |
| Contrast on black | 1.88:1 AA fail |
Built by mixing mediumblue 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.
mediumblue is #0000CD, which is rgb(0, 0, 205) and hsl(240, 100%, 40%). It is one of the 148 CSS named colors defined by the CSS Color Module Level 4.
Medium Blue has a relative luminance of 0.044 on a 0–1 scale, so it is a dark color. Against white it scores 11.16:1; against black, 1.88:1.
mediumblue reaches 11.16:1 against white, which clears WCAG 2.2 AA for normal text (4.5:1) at any size.