indigo blue
- HEX
- #3a18b1
- RGB
- rgb(58, 24, 177)
- HSL
- hsl(253.3, 76.1%, 39.4%)
- CMYK
- cmyk(67.2%, 86.4%, 0%, 30.6%)
- OKLCH
- oklch(38.7% 0.214 279.662)
indigo blue is a blue color with a cool undertone, written #3a18b1 in hexadecimal.
Quick facts
| Family | Blue |
|---|---|
| Undertone | cool |
| Lightness | 39.4% |
| Contrast on white | 10.79 |
| Contrast on black | 1.95 |
Tints, shades and tones
Color harmonies
Accessibility
Contrast ratio against white and black, and the WCAG 2.1 text levels each one passes.
| Background | Contrast ratio | AA normal | AA large | AAA normal | AAA large |
|---|---|---|---|---|---|
| White | 10.79 | Pass | Pass | Pass | Pass |
| Black | 1.95 | Fail | Fail | Fail | Fail |
Similar colors
Sources
This name comes from the xkcd color survey.