Observatory

Q: How do I use #399373 in CSS?

You can use #399373 in CSS with: background-color: #399373; or color: #399373; or as an RGB value: rgb(57, 147, 115). For print design, use CMYK: 61%, 0%, 22%, 42%.

#399373

Observatory is a cool medium color with the hex code #399373. This moderately saturated hue can be represented as RGB 57, 147, 115 in digital design or CMYK 61%, 0%, 22%, 42% for print applications. Find matching Pantone color.

Observatory color values

HEX: #399373
RGB: 57, 147, 115
HSL: 159°, 44%, 40%
CMYK: 61, 0, 22, 42

Shades & tints

Darker Lighter

About this color

Observatory sits at 159° on the color wheel with 44% saturation and 40% lightness, placing it in the cyan segment of the spectrum. The moderate 44% saturation gives it enough color presence to register clearly without competing for dominance in a composition. Its mid-range lightness positions it as a mid-tone: neither a background color nor a deep accent, but something in between.

In digital environments, Observatory is rendered as rgb(57, 147, 115), where the green channel leads at 147, pulling the color toward the green-yellow axis. This cool mid-tone is a reliable choice for UI chrome, informational states, and contexts that call for a calm, readable presence.

For print, Observatory translates to a CMYK breakdown of 61C 0M 22Y 42K. With a moderate key (42%), 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 Observatory

CSS Variable

:root {
  --brand-primary: #399373;
  --brand-primary-rgb: 57, 147, 115;
}

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

Tailwind Config

colors: {
  brand: '#399373',
}

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

Print Design (CMYK)

C: 61%
M: 0%
Y: 22%
K: 42%

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

RGB for Screens

rgb(57, 147, 115)
rgba(57, 147, 115, 0.8)

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

Brands using similar hue

19 brand s with colors near 159° on the color wheel

Frequently asked questions

What color is #399373?

#399373 is Observatory, a cool medium color with RGB values of 57, 147, 115. It has a hue of 159°, 44% saturation, and 40% lightness in the HSL color space.

What is the RGB value of #399373?

The RGB color code for #399373 is rgb(57, 147, 115). This means it contains 57 red, 147 green, and 115 blue in the RGB color model.

Is Observatory a warm or cool color?

Observatory (#399373) is a cool color with a hue between 120-300° on the color wheel.

How do I use #399373 in CSS?

You can use #399373 in CSS with: background-color: #399373; or color: #399373; or as an RGB value: rgb(57, 147, 115). For print design, use CMYK: 61%, 0%, 22%, 42%.