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Cerulean Blue

#1749B5

Cerulean Blue is a cool medium color with the hex code #1749B5. This vibrant hue can be represented as RGB 23, 73, 181 in digital design or CMYK 87%, 60%, 0%, 29% for print applications. Find matching Pantone color.

Cerulean Blue color values

HEX
#1749B5
RGB
23, 73, 181
HSL
221°, 77%, 40%
CMYK
87, 60, 0, 29

Shades & tints

Darker Lighter

About this color

Cerulean Blue sits at 221° on the color wheel with 77% saturation and 40% lightness, placing it in the blue segment of the spectrum. At 77% saturation, the hue is fully legible and confident — richly chromatic without tipping into high-contrast territory. 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, Cerulean Blue is rendered as rgb(23, 73, 181), where the blue channel is highest at 181, producing a strongly blue character. The mid-range lightness and strong saturation make this versatile for both foreground and background roles, depending on what it is paired against.

For print, Cerulean Blue translates to a CMYK breakdown of 87C 60M 0Y 29K. With a moderate key (29%), 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

Split-Complementary

How to use Cerulean Blue

CSS Variable 

:root {
  --brand-primary: #1749B5;
  --brand-primary-rgb: 23, 73, 181;
}

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

Tailwind Config 

colors: {
  brand: '#1749B5',
}

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

Print Design (CMYK) 

C: 87%
M: 60%
Y: 0%
K: 29%

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

RGB for Screens 

rgb(23, 73, 181)
rgba(23, 73, 181, 0.8)

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

Brands using similar hue

24 brand s with colors near 221° on the color wheel

Coinbase logo
Coinbase
HP logo
HP
Intuit logo
Intuit
Signal logo
Signal

Frequently asked questions

What color is #1749B5?
#1749B5 is Cerulean Blue, a cool medium color with RGB values of 23, 73, 181. It has a hue of 221°, 77% saturation, and 40% lightness in the HSL color space.
What is the RGB value of #1749B5?
The RGB color code for #1749B5 is rgb(23, 73, 181). This means it contains 23 red, 73 green, and 181 blue in the RGB color model.
Is Cerulean Blue a warm or cool color?
Cerulean Blue (#1749B5) is a cool color with a hue between 120-300° on the color wheel.
How do I use #1749B5 in CSS?
You can use #1749B5 in CSS with: background-color: #1749B5; or color: #1749B5; or as an RGB value: rgb(23, 73, 181). For print design, use CMYK: 87%, 60%, 0%, 29%.

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