Ultramarine is a
cool dark color with the hex code #280396.
This vibrant hue can be represented as RGB
40, 3, 150 in digital design or CMYK 73%, 98%, 0%, 41% for print applications.
Find matching Pantone color.
Ultramarine
#280396
Ultramarine color values
- HEX
- #280396
- RGB
- 40, 3, 150
- HSL
- 255°, 96%, 30%
- CMYK
- 73, 98, 0, 41
Shades & tints
Darker Lighter
About this color
Ultramarine sits at 255° on the color wheel with 96% saturation and 30% lightness, placing it in the blue-violet segment of the spectrum. With saturation at 96%, 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(40, 3, 150), where the blue channel is highest at 150, 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 73C 98M 0Y 41K. With a moderate key (41%), 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: #280396;
--brand-primary-rgb: 40, 3, 150;
}Define as a CSS custom property for consistent theming across your site.
Tailwind Config
colors: {
brand: '#280396',
}
Add to your Tailwind config to use classes like bg-brand.
Print Design (CMYK)
C: 73%
M: 98%
Y: 0%
K: 41%Use these CMYK values in Adobe Illustrator, InDesign, or print specifications.
RGB for Screens
rgb(40, 3, 150)
rgba(40, 3, 150, 0.8)Use RGB notation for compatibility or add alpha channel for transparency.
Frequently asked questions
What color is #280396?
#280396 is Ultramarine, a cool dark color with RGB values of 40, 3, 150. It has a hue of 255°, 96%
saturation, and 30% lightness in the HSL color
space.
What is the RGB value of #280396?
The RGB color code for #280396 is rgb(40, 3, 150). This means it contains 40 red,
3 green, and 150 blue in the RGB color model.
Is Ultramarine a warm or cool color?
Ultramarine (#280396) is a cool color with a hue between 120-300° on the color wheel.
How do I use #280396 in CSS?
You can use #280396 in CSS with:
background-color: #280396; or color: #280396; or as an RGB value: rgb(40, 3, 150). For print design, use CMYK: 73%, 98%, 0%, 41%.