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Rock Blue

#99B4CC

Rock Blue is a cool light color with the hex code #99B4CC. This moderately saturated hue can be represented as RGB 153, 180, 204 in digital design or CMYK 25%, 12%, 0%, 20% for print applications. Find matching Pantone color.

Rock Blue color values

HEX
#99B4CC
RGB
153, 180, 204
HSL
208°, 33%, 70%
CMYK
25, 12, 0, 20

Shades & tints

Darker Lighter

About this color

Rock Blue sits at 208° on the color wheel with 33% saturation and 70% lightness, placing it in the blue segment of the spectrum. The moderate 33% saturation gives it enough color presence to register clearly without competing for dominance in a composition. At medium-high lightness, it holds its own on white backgrounds while remaining approachable.

In digital environments, Rock Blue is rendered as rgb(153, 180, 204), where the blue channel is highest at 204, though it sits close to the other channels. This cool mid-tone is a reliable choice for UI chrome, informational states, and contexts that call for a calm, readable presence.

For print, Rock Blue translates to a CMYK breakdown of 25C 12M 0Y 20K. The low-to-moderate black value (20%) means the color's character in print comes primarily from its cyan ink content (25%), 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 Rock Blue

CSS Variable 

:root {
  --brand-primary: #99B4CC;
  --brand-primary-rgb: 153, 180, 204;
}

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

Tailwind Config 

colors: {
  brand: '#99B4CC',
}

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

Print Design (CMYK) 

C: 25%
M: 12%
Y: 0%
K: 20%

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

RGB for Screens 

rgb(153, 180, 204)
rgba(153, 180, 204, 0.8)

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

Brands using similar hue

24 brand s with colors near 208° on the color wheel

American Express logo
American Express
Cisco logo
Cisco
Meta logo
Meta
Pepsi logo
Pepsi

Frequently asked questions

What color is #99B4CC?
#99B4CC is Rock Blue, a cool light color with RGB values of 153, 180, 204. It has a hue of 208°, 33% saturation, and 70% lightness in the HSL color space.
What is the RGB value of #99B4CC?
The RGB color code for #99B4CC is rgb(153, 180, 204). This means it contains 153 red, 180 green, and 204 blue in the RGB color model.
Is Rock Blue a warm or cool color?
Rock Blue (#99B4CC) is a cool color with a hue between 120-300° on the color wheel.
How do I use #99B4CC in CSS?
You can use #99B4CC in CSS with: background-color: #99B4CC; or color: #99B4CC; or as an RGB value: rgb(153, 180, 204). For print design, use CMYK: 25%, 12%, 0%, 20%.

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