Royal Blue is the CSS named color #4169E1 — rgb(65, 105, 225), hsl(225, 73%, 57%). Its relative luminance is 0.167, giving 4.85:1 against white and 4.33:1 against black, so it works as a text color on white.
| HEX | #4169E1 |
|---|---|
| RGB | rgb(65, 105, 225) |
| HSL | hsl(225, 73%, 57%) |
| Relative luminance | 0.1666 |
| Contrast on white | 4.85:1 AA pass |
| Contrast on black | 4.33:1 large text only |
Built by mixing royalblue 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.
royalblue is #4169E1, which is rgb(65, 105, 225) and hsl(225, 73%, 57%). It is one of the 148 CSS named colors defined by the CSS Color Module Level 4.
Royal Blue has a relative luminance of 0.167 on a 0–1 scale, so it is a dark color. Against white it scores 4.85:1; against black, 4.33:1.
royalblue reaches 4.85:1 against white, which clears WCAG 2.2 AA for normal text (4.5:1) at any size.