Royal Blue

Q: How do I use #665CD6 in CSS?

You can use #665CD6 in CSS with: background-color: #665CD6; or color: #665CD6; or as an RGB value: rgb(102, 92, 214). For print design, use CMYK: 52%, 57%, 0%, 16%.

#665CD6

Royal Blue is a cool light color with the hex code #665CD6. This vibrant hue can be represented as RGB 102, 92, 214 in digital design or CMYK 52%, 57%, 0%, 16% for print applications. Find matching Pantone color.

Royal Blue color values

HEX: #665CD6
RGB: 102, 92, 214
HSL: 245°, 60%, 60%
CMYK: 52, 57, 0, 16

Shades & tints

Darker Lighter

About this color

Royal Blue sits at 245° on the color wheel with 60% saturation and 60% lightness, placing it in the blue segment of the spectrum. At 60% 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(102, 92, 214), where the blue channel is highest at 214, 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 52C 57M 0Y 16K. The low-to-moderate black value (16%) means the color's character in print comes primarily from its magenta ink content (57%), 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

Analogous

Triadic

Split-Complementary

How to use Royal Blue

CSS Variable

:root {
  --brand-primary: #665CD6;
  --brand-primary-rgb: 102, 92, 214;
}

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

Tailwind Config

colors: {
  brand: '#665CD6',
}

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

Print Design (CMYK)

C: 52%
M: 57%
Y: 0%
K: 16%

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

RGB for Screens

rgb(102, 92, 214)
rgba(102, 92, 214, 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

Frequently asked questions

What color is #665CD6?

#665CD6 is Royal Blue, a cool light color with RGB values of 102, 92, 214. It has a hue of 245°, 60% saturation, and 60% lightness in the HSL color space.

What is the RGB value of #665CD6?

The RGB color code for #665CD6 is rgb(102, 92, 214). This means it contains 102 red, 92 green, and 214 blue in the RGB color model.

Is Royal Blue a warm or cool color?

Royal Blue (#665CD6) is a cool color with a hue between 120-300° on the color wheel.

How do I use #665CD6 in CSS?

You can use #665CD6 in CSS with: background-color: #665CD6; or color: #665CD6; or as an RGB value: rgb(102, 92, 214). For print design, use CMYK: 52%, 57%, 0%, 16%.