#004b8f

Congress Blue

Closest match (98% match)

Color formats

RGB

rgb(0, 75, 143)

Red, Green, Blue components

HSL

hsl(209, 100%, 28%)

Hue, Saturation, Lightness

CMYK

cmyk(100, 48, 0, 44)

Print color encoding

Luminance

0.070

Relative luminance

Variations

Shades (Darkening)

Tints (Lightening)

Tones (Reduced saturation)

Harmonies

Click the color slices to copy the code.

Complementary (Opposite)

#004b8f

#8f4400

Analogous (Adjacent)

#008f8c

#004b8f

#00038f

Triadic

#004b8f

#8f004b

#4b8f00

Split complementary

#004b8f

#8f0003

#8f8b00

Complete conversion table

HEX

#004B8F

RGB

rgb(0,75,143)

RGBA

rgba(0,75,143, 1)

HSL

hsl(208.53,100%,28.04%)

OKLCH (Modern CSS)

oklch(0.41 0.13 253.4)

CSS Variable

--color: #004b8f;

Preview

Readability and Typography

Headline Test

This text demonstrates the reading experience on this background color.

Headline Test

This text demonstrates the reading experience on this background color.

UI Component Set

This is an example alert bar using the selected color.

SOLIDSOFTOUTLINE

Product Mockup

4582 •••• •••• 9018

CARDHOLDER

JOHN DOE

VALID

12/28

Mobile application

Customer support

Hi! How can we help you today?

I love this new color! 😍

Data visualization

Weekly growth

+1,240

12.5%

WED

2,450

Contrast

Contrast and readability (WCAG)

On white background

8.74

Small text (14pt)

The quick brown fox jumps over...

AAA

Large text or UI (18pt Bold)

AAA

On black background

2.40

Small text (14pt)

The quick brown fox jumps over...

AAA

Large text or UI (18pt Bold)

AAA

Color blindness simulator

ORIG

SIM

Protanopia (red)

#004b8f#696a8f

ORIG

SIM

Deuteranopia (green)

#004b8f#352b8f

ORIG

SIM

Tritanopia (blue)

#004b8f#042328

ORIG

SIM

Monochrome (color blind)

#004b8f#4b4b4b

Mixing guide

How to mix this color using physical paints or printing inks.

MIXING PALETTE

49%

44%

RYB PIGMENTS

Ultramarine blue

Pigment

49%

Ivory black

Pigment

44%

Cadmium yellow

Pigment

Unlike light, mixing paints makes colors darker. This simulation mimics the behavior of physical pigments.

Physical properties

Perceptual and light-related properties derived from the digital color.

Spectral relationship

Blue hue

450–495 nm • closest visible-spectrum range

750 nm

380 nm

Visual temperature

Cool

A perceptual warm–cool classification. Kelvin does not apply to an arbitrary interface color.

Cool

Neutral

Warm

Luminance (brightness)

7.0%

Dark • relative luminance

50%

100%

An RGB color is produced by combined screen light, so this range is a visual comparison rather than an exact physical wavelength.

Gradient gallery

Generate premium CSS backgrounds and textures from your color.

Similar & Related Colors

Mathematically computed harmonies, shades, and similar tones for this color.

Olympian Blue

#1C4C8C

Dancing Sea

#1C4D8F

Night Mode

#234E86

Pacific Depths

#004488

Brown

#8F4400

Navy Blue

#00038F

Teal

#008F8C

Fresh Eggplant

#8F004B

Limeade

#4B8F00

Red Berry

#8F0003

Indigo

#567FCA

Prussian Blue

#001D58