Dark Blue

Q: How do I use #1B15B7 in CSS?

You can use #1B15B7 in CSS with: background-color: #1B15B7; or color: #1B15B7; or as an RGB value: rgb(27, 21, 183). For print design, use CMYK: 85%, 89%, 0%, 28%.

#1B15B7

Dark Blue is a cool medium color with the hex code #1B15B7. This vibrant hue can be represented as RGB 27, 21, 183 in digital design or CMYK 85%, 89%, 0%, 28% for print applications. Find matching Pantone color.

Dark Blue color values

HEX: #1B15B7
RGB: 27, 21, 183
HSL: 242°, 79%, 40%
CMYK: 85, 89, 0, 28

Shades & tints

Darker Lighter

About this color

Dark Blue sits at 242° on the color wheel with 79% saturation and 40% lightness, placing it in the blue segment of the spectrum. At 79% 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, Dark Blue is rendered as rgb(27, 21, 183), where the blue channel is highest at 183, 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, Dark Blue translates to a CMYK breakdown of 85C 89M 0Y 28K. With a moderate key (28%), 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 Dark Blue

CSS Variable

:root {
  --brand-primary: #1B15B7;
  --brand-primary-rgb: 27, 21, 183;
}

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

Tailwind Config

colors: {
  brand: '#1B15B7',
}

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

Print Design (CMYK)

C: 85%
M: 89%
Y: 0%
K: 28%

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

RGB for Screens

rgb(27, 21, 183)
rgba(27, 21, 183, 0.8)

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

Brands using similar hue

24 brand s with colors near 242° on the color wheel

Frequently asked questions

What color is #1B15B7?

#1B15B7 is Dark Blue, a cool medium color with RGB values of 27, 21, 183. It has a hue of 242°, 79% saturation, and 40% lightness in the HSL color space.

What is the RGB value of #1B15B7?

The RGB color code for #1B15B7 is rgb(27, 21, 183). This means it contains 27 red, 21 green, and 183 blue in the RGB color model.

Is Dark Blue a warm or cool color?

Dark Blue (#1B15B7) is a cool color with a hue between 120-300° on the color wheel.

How do I use #1B15B7 in CSS?

You can use #1B15B7 in CSS with: background-color: #1B15B7; or color: #1B15B7; or as an RGB value: rgb(27, 21, 183). For print design, use CMYK: 85%, 89%, 0%, 28%.