Ultramarine is a
cool dark color with the hex code #05008C.
Also known as
"Warner Bros. Blue"
by Warner Bros.
.
This vibrant hue can be represented as RGB
5, 0, 140 in digital design or CMYK 96%, 100%, 0%, 45% for print applications.
Find matching Pantone color.
Currently, 1 brand uses this color in their visual identity, making it a proven choice for professional branding and web design.
Ultramarine
#05008C aka “Warner Bros. Blue” by Warner Bros.
Ultramarine color values
- HEX
- #05008C
- RGB
- 5, 0, 140
- HSL
- 242°, 100%, 27%
- CMYK
- 96, 100, 0, 45
Shades & tints
Darker Lighter
About this color
Ultramarine sits at 242° on the color wheel with 100% saturation and 27% 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. The lower lightness gives it weight and depth, lending gravity to any palette it enters.
In digital environments, Ultramarine is rendered as rgb(5, 0, 140), where the blue channel is highest at 140, 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 96C 100M 0Y 45K. With a moderate key (45%), 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. In brand applications, this exact value is specified as Warner Bros. Blue.
Color harmonies
Complementary
Analogous
Triadic
Split-Complementary
How to use Ultramarine
CSS Variable
:root {
--brand-primary: #05008C;
--brand-primary-rgb: 5, 0, 140;
}Define as a CSS custom property for consistent theming across your site.
Tailwind Config
colors: {
brand: '#05008C',
}
Add to your Tailwind config to use classes like bg-brand.
Print Design (CMYK)
C: 96%
M: 100%
Y: 0%
K: 45%Use these CMYK values in Adobe Illustrator, InDesign, or print specifications.
RGB for Screens
rgb(5, 0, 140)
rgba(5, 0, 140, 0.8)Use RGB notation for compatibility or add alpha channel for transparency.
Brands using Ultramarine
1 brand uses this color in their identity
Frequently asked questions
What color is #05008C?
#05008C is Ultramarine, a cool dark color with RGB values of 5, 0, 140. It has a hue of 242°, 100%
saturation, and 27% lightness in the HSL color
space.
What is the RGB value of #05008C?
The RGB color code for #05008C is rgb(5, 0, 140). This means it contains 5 red,
0 green, and 140 blue in the RGB color model.
Is Ultramarine a warm or cool color?
Ultramarine (#05008C) is a cool color with a hue between 120-300° on the color wheel.
How do I use #05008C in CSS?
You can use #05008C in CSS with:
background-color: #05008C; or color: #05008C; or as an RGB value: rgb(5, 0, 140). For print design, use CMYK: 96%, 100%, 0%, 45%.