Boston Blue

Q: How do I use #188AB4 in CSS?

You can use #188AB4 in CSS with: background-color: #188AB4; or color: #188AB4; or as an RGB value: rgb(24, 138, 180). For print design, use CMYK: 87%, 23%, 0%, 29%.

#188AB4

Boston Blue is a cool medium color with the hex code #188AB4. This vibrant hue can be represented as RGB 24, 138, 180 in digital design or CMYK 87%, 23%, 0%, 29% for print applications. Find matching Pantone color.

Boston Blue color values

HEX: #188AB4
RGB: 24, 138, 180
HSL: 196°, 76%, 40%
CMYK: 87, 23, 0, 29

Shades & tints

Darker Lighter

About this color

Boston Blue sits at 196° on the color wheel with 76% saturation and 40% 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. 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, Boston Blue is rendered as rgb(24, 138, 180), where the blue channel is highest at 180, anchoring the color in the cool register. 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, Boston Blue translates to a CMYK breakdown of 87C 23M 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

Analogous

Triadic

Split-Complementary

How to use Boston Blue

CSS Variable

:root {
  --brand-primary: #188AB4;
  --brand-primary-rgb: 24, 138, 180;
}

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

Tailwind Config

colors: {
  brand: '#188AB4',
}

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

Print Design (CMYK)

C: 87%
M: 23%
Y: 0%
K: 29%

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

RGB for Screens

rgb(24, 138, 180)
rgba(24, 138, 180, 0.8)

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

Brands using similar hue

24 brand s with colors near 196° on the color wheel

Frequently asked questions

What color is #188AB4?

#188AB4 is Boston Blue, a cool medium color with RGB values of 24, 138, 180. It has a hue of 196°, 76% saturation, and 40% lightness in the HSL color space.

What is the RGB value of #188AB4?

The RGB color code for #188AB4 is rgb(24, 138, 180). This means it contains 24 red, 138 green, and 180 blue in the RGB color model.

Is Boston Blue a warm or cool color?

Boston Blue (#188AB4) is a cool color with a hue between 120-300° on the color wheel.

How do I use #188AB4 in CSS?

You can use #188AB4 in CSS with: background-color: #188AB4; or color: #188AB4; or as an RGB value: rgb(24, 138, 180). For print design, use CMYK: 87%, 23%, 0%, 29%.