Boston Blue

Q: How do I use #138DB9 in CSS?

You can use #138DB9 in CSS with: background-color: #138DB9; or color: #138DB9; or as an RGB value: rgb(19, 141, 185). For print design, use CMYK: 90%, 24%, 0%, 27%.

#138DB9

Boston Blue is a cool medium color with the hex code #138DB9. This vibrant hue can be represented as RGB 19, 141, 185 in digital design or CMYK 90%, 24%, 0%, 27% for print applications. Find matching Pantone color.

Boston Blue color values

HEX: #138DB9
RGB: 19, 141, 185
HSL: 196°, 81%, 40%
CMYK: 90, 24, 0, 27

Shades & tints

Darker Lighter

About this color

Boston Blue sits at 196° on the color wheel with 81% saturation and 40% lightness, placing it in the blue segment of the spectrum. With saturation at 81%, this is a high-chroma color: the kind that anchors palettes and demands considered placement. 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(19, 141, 185), where the blue channel is highest at 185, 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 90C 24M 0Y 27K. With a moderate key (27%), 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: #138DB9;
  --brand-primary-rgb: 19, 141, 185;
}

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

Tailwind Config

colors: {
  brand: '#138DB9',
}

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

Print Design (CMYK)

C: 90%
M: 24%
Y: 0%
K: 27%

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

RGB for Screens

rgb(19, 141, 185)
rgba(19, 141, 185, 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 #138DB9?

#138DB9 is Boston Blue, a cool medium color with RGB values of 19, 141, 185. It has a hue of 196°, 81% saturation, and 40% lightness in the HSL color space.

What is the RGB value of #138DB9?

The RGB color code for #138DB9 is rgb(19, 141, 185). This means it contains 19 red, 141 green, and 185 blue in the RGB color model.

Is Boston Blue a warm or cool color?

Boston Blue (#138DB9) is a cool color with a hue between 120-300° on the color wheel.

How do I use #138DB9 in CSS?

You can use #138DB9 in CSS with: background-color: #138DB9; or color: #138DB9; or as an RGB value: rgb(19, 141, 185). For print design, use CMYK: 90%, 24%, 0%, 27%.