Ultramarine

Q: How do I use #001FB8 in CSS?

You can use #001FB8 in CSS with: background-color: #001FB8; or color: #001FB8; or as an RGB value: rgb(0, 31, 184). For print design, use CMYK: 100%, 83%, 0%, 28%.

#001FB8

Ultramarine is a cool dark color with the hex code #001FB8. This vibrant hue can be represented as RGB 0, 31, 184 in digital design or CMYK 100%, 83%, 0%, 28% for print applications. Find matching Pantone color.

Ultramarine color values

HEX: #001FB8
RGB: 0, 31, 184
HSL: 230°, 100%, 36%
CMYK: 100, 83, 0, 28

Shades & tints

Darker Lighter

About this color

Ultramarine sits at 230° on the color wheel with 100% saturation and 36% lightness, placing it in the blue segment of the spectrum. With saturation at 100%, this is a high-chroma color: the kind that anchors palettes and demands considered placement. Its mid-range lightness positions it as a mid-tone: neither a background color nor a deep accent, but something in between.

In digital environments, Ultramarine is rendered as rgb(0, 31, 184), where the blue channel is highest at 184, producing a strongly blue character. High saturation combined with low lightness creates deep, jewel-toned results — useful for premium UI elements, hover states, and focused interaction areas.

For print, Ultramarine translates to a CMYK breakdown of 100C 83M 0Y 28K. With a moderate key (28%), this color uses black to deepen the chromatic channels rather than replace them, a profile that typically holds up well in both offset and digital print. No brands in the brandkit.pro library currently specify this exact hex as a named brand color.

Color harmonies

Complementary

Analogous

Triadic

Split-Complementary

How to use Ultramarine

CSS Variable

:root {
  --brand-primary: #001FB8;
  --brand-primary-rgb: 0, 31, 184;
}

Define as a CSS custom property for consistent theming across your site.

Tailwind Config

colors: {
  brand: '#001FB8',
}

Add to your Tailwind config to use classes like bg-brand.

Print Design (CMYK)

C: 100%
M: 83%
Y: 0%
K: 28%

Use these CMYK values in Adobe Illustrator, InDesign, or print specifications.

RGB for Screens

rgb(0, 31, 184)
rgba(0, 31, 184, 0.8)

Use RGB notation for compatibility or add alpha channel for transparency.

Brands using similar hue

24 brand s with colors near 230° on the color wheel

Frequently asked questions

What color is #001FB8?

#001FB8 is Ultramarine, a cool dark color with RGB values of 0, 31, 184. It has a hue of 230°, 100% saturation, and 36% lightness in the HSL color space.

What is the RGB value of #001FB8?

The RGB color code for #001FB8 is rgb(0, 31, 184). This means it contains 0 red, 31 green, and 184 blue in the RGB color model.

Is Ultramarine a warm or cool color?

Ultramarine (#001FB8) is a cool color with a hue between 120-300° on the color wheel.

How do I use #001FB8 in CSS?

You can use #001FB8 in CSS with: background-color: #001FB8; or color: #001FB8; or as an RGB value: rgb(0, 31, 184). For print design, use CMYK: 100%, 83%, 0%, 28%.