Astronaut Blue is a
cool dark color with the hex code #0C3C5A.
This vibrant hue can be represented as RGB
12, 60, 90 in digital design or CMYK 87%, 33%, 0%, 65% for print applications.
Find matching Pantone color.
Astronaut Blue
#0C3C5A
Astronaut Blue color values
- HEX
- #0C3C5A
- RGB
- 12, 60, 90
- HSL
- 203°, 76%, 20%
- CMYK
- 87, 33, 0, 65
Shades & tints
Darker Lighter
About this color
Astronaut Blue sits at 203° on the color wheel with 76% saturation and 20% lightness, placing it in the blue segment of the spectrum. At 76% saturation, the hue is fully legible and confident — richly chromatic without tipping into high-contrast territory. The lower lightness gives it weight and depth, lending gravity to any palette it enters.
In digital environments, Astronaut Blue is rendered as rgb(12, 60, 90), where the blue channel is highest at 90, anchoring the color in the cool register. High saturation combined with low lightness creates deep, jewel-toned results — useful for premium UI elements, hover states, and focused interaction areas.
For print, Astronaut Blue translates to a CMYK breakdown of 87C 33M 0Y 65K. A substantial black component (65%) anchors this color in print. The remaining ink channels supplement rather than drive the hue, which keeps the result stable across different paper stocks. 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 Astronaut Blue
CSS Variable
:root {
--brand-primary: #0C3C5A;
--brand-primary-rgb: 12, 60, 90;
}Define as a CSS custom property for consistent theming across your site.
Tailwind Config
colors: {
brand: '#0C3C5A',
}
Add to your Tailwind config to use classes like bg-brand.
Print Design (CMYK)
C: 87%
M: 33%
Y: 0%
K: 65%Use these CMYK values in Adobe Illustrator, InDesign, or print specifications.
RGB for Screens
rgb(12, 60, 90)
rgba(12, 60, 90, 0.8)Use RGB notation for compatibility or add alpha channel for transparency.
Frequently asked questions
What color is #0C3C5A?
#0C3C5A is Astronaut Blue, a cool dark color with RGB values of 12, 60, 90. It has a hue of 203°, 76%
saturation, and 20% lightness in the HSL color
space.
What is the RGB value of #0C3C5A?
The RGB color code for #0C3C5A is rgb(12, 60, 90). This means it contains 12 red,
60 green, and 90 blue in the RGB color model.
Is Astronaut Blue a warm or cool color?
Astronaut Blue (#0C3C5A) is a cool color with a hue between 120-300° on the color wheel.
How do I use #0C3C5A in CSS?
You can use #0C3C5A in CSS with:
background-color: #0C3C5A; or color: #0C3C5A; or as an RGB value: rgb(12, 60, 90). For print design, use CMYK: 87%, 33%, 0%, 65%.