#003aaf

Cobalt

Closest match (95% match)

Color formats

RGB

rgb(0, 58, 175)

Red, Green, Blue components

HSL

hsl(220, 100%, 34%)

Hue, Saturation, Lightness

CMYK

cmyk(100, 67, 0, 31)

Print color encoding

Luminance

0.061

Relative luminance

Variations

Shades (Darkening)

Tints (Lightening)

Tones (Reduced saturation)

Harmonies

Click the color slices to copy the code.

Complementary (Opposite)

#003aaf

#af7500

Analogous (Adjacent)

#0091af

#003aaf

#1e00af

Triadic

#003aaf

#af003a

#3aaf00

Split complementary

#003aaf

#af1e00

#91af00

Complete conversion table

HEX

#003AAF

RGB

rgb(0,58,175)

RGBA

rgba(0,58,175, 1)

HSL

hsl(220.11,100%,34.31%)

OKLCH (Modern CSS)

oklch(0.41 0.19 262.3)

CSS Variable

--color: #003aaf;

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

9.44

Small text (14pt)

The quick brown fox jumps over...

AAA

Large text or UI (18pt Bold)

AAA

On black background

2.22

Small text (14pt)

The quick brown fox jumps over...

AAA

Large text or UI (18pt Bold)

AAA

Color blindness simulator

ORIG

SIM

Protanopia (red)

#003aaf#6d6faf

ORIG

SIM

Deuteranopia (green)

#003aaf#4135af

ORIG

SIM

Tritanopia (blue)

#003aaf#031b1f

ORIG

SIM

Monochrome (color blind)

#003aaf#454361

Mixing guide

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

MIXING PALETTE

63%

31%

RYB PIGMENTS

Ultramarine blue

Pigment

63%

Ivory black

Pigment

31%

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)

6.1%

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

Blue Screen of Death

#0033BB

Denim

#2243B6

Once in a Blue Moon

#0044BB

Pirate Gold

#AF7500

Dark Blue

#1E00AF

Bondi Blue

#0091AF

Shiraz

#AF003A

Limeade

#3AAF00

Milano Red

#AF1E00

Cornflower Blue

#626DEC

Navy Blue

#000F75