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Royal Blue

#645AD8

Royal Blue is a cool light color with the hex code #645AD8. This vibrant hue can be represented as RGB 100, 90, 216 in digital design or CMYK 54%, 58%, 0%, 15% for print applications. Find matching Pantone color.

Royal Blue color values

HEX
#645AD8
RGB
100, 90, 216
HSL
245°, 62%, 60%
CMYK
54, 58, 0, 15

Shades & tints

Darker Lighter

About this color

Royal Blue sits at 245° on the color wheel with 62% saturation and 60% lightness, placing it in the blue segment of the spectrum. At 62% saturation, the hue is fully legible and confident — richly chromatic without tipping into high-contrast territory. At medium-high lightness, it holds its own on white backgrounds while remaining approachable.

In digital environments, Royal Blue is rendered as rgb(100, 90, 216), where the blue channel is highest at 216, producing a strongly blue character. High saturation at this lightness produces strong contrast against white — effective for CTAs, badges, and elements that need to stop the eye.

For print, Royal Blue translates to a CMYK breakdown of 54C 58M 0Y 15K. The low-to-moderate black value (15%) means the color's character in print comes primarily from its magenta ink content (58%), with black serving as a supporting shadow tone. 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 Royal Blue

CSS Variable 

:root {
  --brand-primary: #645AD8;
  --brand-primary-rgb: 100, 90, 216;
}

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

Tailwind Config 

colors: {
  brand: '#645AD8',
}

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

Print Design (CMYK) 

C: 54%
M: 58%
Y: 0%
K: 15%

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

RGB for Screens 

rgb(100, 90, 216)
rgba(100, 90, 216, 0.8)

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

Brands using similar hue

21 brand s with colors near 245° on the color wheel

Stripe logo
Stripe
Warner Bros. logo
Warner Bros.
Revolut logo
Revolut
Visa logo
Visa

Frequently asked questions

What color is #645AD8?
#645AD8 is Royal Blue, a cool light color with RGB values of 100, 90, 216. It has a hue of 245°, 62% saturation, and 60% lightness in the HSL color space.
What is the RGB value of #645AD8?
The RGB color code for #645AD8 is rgb(100, 90, 216). This means it contains 100 red, 90 green, and 216 blue in the RGB color model.
Is Royal Blue a warm or cool color?
Royal Blue (#645AD8) is a cool color with a hue between 120-300° on the color wheel.
How do I use #645AD8 in CSS?
You can use #645AD8 in CSS with: background-color: #645AD8; or color: #645AD8; or as an RGB value: rgb(100, 90, 216). For print design, use CMYK: 54%, 58%, 0%, 15%.

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