Indigo Blue Color – #3a18b1: Codes and Complete Breakdown
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The Indigo Blue color hex code is #3a18b1, and it is composed of 23% red, 9% green and 69% blue.
Indigo Blue is a dark, bright, and cool color at 86% saturation. It has a contrast ratio of 10.79:1 against a white background, which passes WCAG AA (Web Content Accessibility Guidelines, Level AA) compliance.
For better visibility, it is recommended to use the Indigo Blue color (#3a18b1) against light backgrounds.

Indigo Blue Color Shades
Complementary colors
Triadic colors
Tints or lighter colors
Darker colors
Analogous colors
Monochromatic colors
#3a18b1
Indigo Blue Color Codes and Information
Here’s a complete breakdown of the color Indigo Blue, including its HEX, RGB, HSL, and CMYK values, as well as other information about the color.
| Data Type | Values/Details |
|---|---|
| Hex | #3a18b1 |
| RGB | rgb(58,24,177) |
| HSL | hsl(253,76.1%,39.4%) |
| CMYK | 67, 86, 0, 31 |
| HSV | 253, 86, 69 |
| RGB % | 23, 9, 69 |
| XYZ | 10, 4.7, 42 |
| LAB | 25.9, 55.6, -73.4 |
| Color Category | Dark |
| Color Family | Blue |
| Saturation | 86% |
| Temperature | Cool |
| Contrast Ratio Againt White (#ffffff) | 10.79 (passes WCAG AA) |
| Contrast Ratio Againt Black (#000000) | 1.95 (fails WCAG AA) |
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