Cerulean Blue is a
cool medium color with the hex code #305BCF.
This vibrant hue can be represented as RGB
48, 91, 207 in digital design or CMYK 77%, 56%, 0%, 19% for print applications.
Find matching Pantone color.
Cerulean Blue
#305BCF
Cerulean Blue color values
- HEX
- #305BCF
- RGB
- 48, 91, 207
- HSL
- 224°, 62%, 50%
- CMYK
- 77, 56, 0, 19
Shades & tints
Darker Lighter
About this color
Cerulean Blue sits at 224° on the color wheel with 62% saturation and 50% 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. 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, Cerulean Blue is rendered as rgb(48, 91, 207), where the blue channel is highest at 207, producing a strongly blue character. 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, Cerulean Blue translates to a CMYK breakdown of 77C 56M 0Y 19K. The low-to-moderate black value (19%) means the color's character in print comes primarily from its cyan ink content (77%), 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 Cerulean Blue
CSS Variable
:root {
--brand-primary: #305BCF;
--brand-primary-rgb: 48, 91, 207;
}Define as a CSS custom property for consistent theming across your site.
Tailwind Config
colors: {
brand: '#305BCF',
}
Add to your Tailwind config to use classes like bg-brand.
Print Design (CMYK)
C: 77%
M: 56%
Y: 0%
K: 19%Use these CMYK values in Adobe Illustrator, InDesign, or print specifications.
RGB for Screens
rgb(48, 91, 207)
rgba(48, 91, 207, 0.8)Use RGB notation for compatibility or add alpha channel for transparency.
Frequently asked questions
What color is #305BCF?
#305BCF is Cerulean Blue, a cool medium color with RGB values of 48, 91, 207. It has a hue of 224°, 62%
saturation, and 50% lightness in the HSL color
space.
What is the RGB value of #305BCF?
The RGB color code for #305BCF is rgb(48, 91, 207). This means it contains 48 red,
91 green, and 207 blue in the RGB color model.
Is Cerulean Blue a warm or cool color?
Cerulean Blue (#305BCF) is a cool color with a hue between 120-300° on the color wheel.
How do I use #305BCF in CSS?
You can use #305BCF in CSS with:
background-color: #305BCF; or color: #305BCF; or as an RGB value: rgb(48, 91, 207). For print design, use CMYK: 77%, 56%, 0%, 19%.