#023bb5

Cobalt

Closest match (95% match)

Color formats

RGB

rgb(2, 59, 181)

Red, Green, Blue components

HSL

hsl(221, 98%, 36%)

Hue, Saturation, Lightness

CMYK

cmyk(99, 67, 0, 29)

Print color encoding

Luminance

0.065

Relative luminance

Variations

Shades (Darkening)

Tints (Lightening)

Tones (Reduced saturation)

Harmonies

Click the color slices to copy the code.

Complementary (Opposite)

#023bb5

#b57c02

Analogous (Adjacent)

#0295b5

#023bb5

#2202b5

Triadic

#023bb5

#b5023b

#3bb502

Split complementary

#023bb5

#b52202

#95b502

Complete conversion table

HEX

#023BB5

RGB

rgb(2,59,181)

RGBA

rgba(2,59,181, 1)

HSL

hsl(220.89,97.81%,35.88%)

OKLCH (Modern CSS)

oklch(0.41 0.20 262.7)

CSS Variable

--color: #023bb5;

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

9.15

Small text (14pt)

The quick brown fox jumps over...

AAA

Large text or UI (18pt Bold)

AAA

On black background

2.30

Small text (14pt)

The quick brown fox jumps over...

AAA

Large text or UI (18pt Bold)

AAA

Color blindness simulator

ORIG

SIM

Protanopia (red)

#023bb5#7172b5

ORIG

SIM

Deuteranopia (green)

#023bb5#4438b5

ORIG

SIM

Tritanopia (blue)

#023bb5#051d20

ORIG

SIM

Monochrome (color blind)

#023bb5#474467

Mixing guide

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

MIXING PALETTE

66%

29%

RYB PIGMENTS

Ultramarine blue

Pigment

66%

Ivory black

Pigment

29%

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)

6.5%

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.

Blue Hour

#0034AB

Denim

#2243B6

Blue Screen of Death

#0033BB

Once in a Blue Moon

#0044BB

Pirate Gold

#B57C02

Dark Blue

#2202B5

Bondi Blue

#0295B5

Shiraz

#B5023B

Limeade

#3BB502

Milano Red

#B52202

Cornflower Blue

#646EF3

Navy Blue

#00107B