Blue Gem

Q: How do I use #370D8C in CSS?

You can use #370D8C in CSS with: background-color: #370D8C; or color: #370D8C; or as an RGB value: rgb(55, 13, 140). For print design, use CMYK: 61%, 91%, 0%, 45%.

#370D8C

Blue Gem is a cool dark color with the hex code #370D8C. This vibrant hue can be represented as RGB 55, 13, 140 in digital design or CMYK 61%, 91%, 0%, 45% for print applications. Find matching Pantone color.

Blue Gem color values

HEX: #370D8C
RGB: 55, 13, 140
HSL: 260°, 83%, 30%
CMYK: 61, 91, 0, 45

Shades & tints

Darker Lighter

About this color

Blue Gem sits at 260° on the color wheel with 83% saturation and 30% lightness, placing it in the blue-violet segment of the spectrum. With saturation at 83%, this is a high-chroma color: the kind that anchors palettes and demands considered placement. The lower lightness gives it weight and depth, lending gravity to any palette it enters.

In digital environments, Blue Gem is rendered as rgb(55, 13, 140), where the blue channel is highest at 140, producing a strongly blue character. High saturation combined with low lightness creates deep, jewel-toned results — useful for premium UI elements, hover states, and focused interaction areas.

For print, Blue Gem translates to a CMYK breakdown of 61C 91M 0Y 45K. With a moderate key (45%), 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 Blue Gem

CSS Variable

:root {
  --brand-primary: #370D8C;
  --brand-primary-rgb: 55, 13, 140;
}

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

Tailwind Config

colors: {
  brand: '#370D8C',
}

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

Print Design (CMYK)

C: 61%
M: 91%
Y: 0%
K: 45%

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

RGB for Screens

rgb(55, 13, 140)
rgba(55, 13, 140, 0.8)

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

Brands using similar hue

14 brand s with colors near 260° on the color wheel

Frequently asked questions

What color is #370D8C?

#370D8C is Blue Gem, a cool dark color with RGB values of 55, 13, 140. It has a hue of 260°, 83% saturation, and 30% lightness in the HSL color space.

What is the RGB value of #370D8C?

The RGB color code for #370D8C is rgb(55, 13, 140). This means it contains 55 red, 13 green, and 140 blue in the RGB color model.

Is Blue Gem a warm or cool color?

Blue Gem (#370D8C) is a cool color with a hue between 120-300° on the color wheel.

How do I use #370D8C in CSS?

You can use #370D8C in CSS with: background-color: #370D8C; or color: #370D8C; or as an RGB value: rgb(55, 13, 140). For print design, use CMYK: 61%, 91%, 0%, 45%.