Astronaut

Q: How do I use #1D3A7C in CSS?

You can use #1D3A7C in CSS with: background-color: #1D3A7C; or color: #1D3A7C; or as an RGB value: rgb(29, 58, 124). For print design, use CMYK: 77%, 53%, 0%, 51%.

#1D3A7C

Astronaut is a cool dark color with the hex code #1D3A7C. This vibrant hue can be represented as RGB 29, 58, 124 in digital design or CMYK 77%, 53%, 0%, 51% for print applications. Find matching Pantone color.

Astronaut color values

HEX: #1D3A7C
RGB: 29, 58, 124
HSL: 222°, 62%, 30%
CMYK: 77, 53, 0, 51

Shades & tints

Darker Lighter

About this color

Astronaut sits at 222° on the color wheel with 62% saturation and 30% lightness, placing it in the blue segment of the spectrum. At 62% 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 is rendered as rgb(29, 58, 124), where the blue channel is highest at 124, 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, Astronaut translates to a CMYK breakdown of 77C 53M 0Y 51K. A substantial black component (51%) 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

CSS Variable

:root {
  --brand-primary: #1D3A7C;
  --brand-primary-rgb: 29, 58, 124;
}

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

Tailwind Config

colors: {
  brand: '#1D3A7C',
}

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

Print Design (CMYK)

C: 77%
M: 53%
Y: 0%
K: 51%

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

RGB for Screens

rgb(29, 58, 124)
rgba(29, 58, 124, 0.8)

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

Brands using similar hue

24 brand s with colors near 222° on the color wheel

Frequently asked questions

What color is #1D3A7C?

#1D3A7C is Astronaut, a cool dark color with RGB values of 29, 58, 124. It has a hue of 222°, 62% saturation, and 30% lightness in the HSL color space.

What is the RGB value of #1D3A7C?

The RGB color code for #1D3A7C is rgb(29, 58, 124). This means it contains 29 red, 58 green, and 124 blue in the RGB color model.

Is Astronaut a warm or cool color?

Astronaut (#1D3A7C) is a cool color with a hue between 120-300° on the color wheel.

How do I use #1D3A7C in CSS?

You can use #1D3A7C in CSS with: background-color: #1D3A7C; or color: #1D3A7C; or as an RGB value: rgb(29, 58, 124). For print design, use CMYK: 77%, 53%, 0%, 51%.