Ultramarine is a
cool dark color with the hex code #210B8E.
This vibrant hue can be represented as RGB
33, 11, 142 in digital design or CMYK 77%, 92%, 0%, 44% for print applications.
Find matching Pantone color.
Ultramarine
#210B8E
Ultramarine color values
- HEX
- #210B8E
- RGB
- 33, 11, 142
- HSL
- 250°, 86%, 30%
- CMYK
- 77, 92, 0, 44
Shades & tints
Darker Lighter
About this color
Ultramarine sits at 250° on the color wheel with 86% saturation and 30% lightness, placing it in the blue segment of the spectrum. With saturation at 86%, this is a high-chroma color: the kind that anchors palettes and demands considered placement. The lower lightness gives it weight and depth, lending gravity to any palette it enters.
In digital environments, Ultramarine is rendered as rgb(33, 11, 142), where the blue channel is highest at 142, 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 77C 92M 0Y 44K. With a moderate key (44%), 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: #210B8E;
--brand-primary-rgb: 33, 11, 142;
}Define as a CSS custom property for consistent theming across your site.
Tailwind Config
colors: {
brand: '#210B8E',
}
Add to your Tailwind config to use classes like bg-brand.
Print Design (CMYK)
C: 77%
M: 92%
Y: 0%
K: 44%Use these CMYK values in Adobe Illustrator, InDesign, or print specifications.
RGB for Screens
rgb(33, 11, 142)
rgba(33, 11, 142, 0.8)Use RGB notation for compatibility or add alpha channel for transparency.
Brands using similar hue
16 brand s with colors near 250° on the color wheel
Frequently asked questions
What color is #210B8E?
#210B8E is Ultramarine, a cool dark color with RGB values of 33, 11, 142. It has a hue of 250°, 86%
saturation, and 30% lightness in the HSL color
space.
What is the RGB value of #210B8E?
The RGB color code for #210B8E is rgb(33, 11, 142). This means it contains 33 red,
11 green, and 142 blue in the RGB color model.
Is Ultramarine a warm or cool color?
Ultramarine (#210B8E) is a cool color with a hue between 120-300° on the color wheel.
How do I use #210B8E in CSS?
You can use #210B8E in CSS with:
background-color: #210B8E; or color: #210B8E; or as an RGB value: rgb(33, 11, 142). For print design, use CMYK: 77%, 92%, 0%, 44%.