#0129bc

International Klein Blue

Closest match (97% match)

Color formats

RGB

rgb(1, 41, 188)

Red, Green, Blue components

HSL

hsl(227, 99%, 37%)

Hue, Saturation, Lightness

CMYK

cmyk(99, 78, 0, 26)

Print color encoding

Luminance

0.052

Relative luminance

Variations

Shades (Darkening)

Tints (Lightening)

Tones (Reduced saturation)

Harmonies

Click the color slices to copy the code.

Complementary (Opposite)

#0129bc

#bc9401

Analogous (Adjacent)

#0187bc

#0129bc

#3601bc

Triadic

#0129bc

#bc0129

#29bc01

Split complementary

#0129bc

#bc3601

#87bc01

Complete conversion table

HEX

#0129BC

RGB

rgb(1,41,188)

RGBA

rgba(1,41,188, 1)

HSL

hsl(227.17,98.94%,37.06%)

OKLCH (Modern CSS)

oklch(0.39 0.23 264.1)

CSS Variable

--color: #0129bc;

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

10.27

Small text (14pt)

The quick brown fox jumps over...

AAA

Large text or UI (18pt Bold)

AAA

On black background

2.04

Small text (14pt)

The quick brown fox jumps over...

AAA

Large text or UI (18pt Bold)

AAA

Color blindness simulator

ORIG

SIM

Protanopia (red)

#0129bc#6a6bbc

ORIG

SIM

Deuteranopia (green)

#0129bc#4639bc

ORIG

SIM

Tritanopia (blue)

#0129bc#031416

ORIG

SIM

Monochrome (color blind)

#0129bc#423871

Mixing guide

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

MIXING PALETTE

70%

26%

RYB PIGMENTS

Ultramarine blue

Pigment

70%

Ivory black

Pigment

26%

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)

5.2%

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.

Sapphire Splendour

#2425B9

Blue Screen of Death

#0033BB

Sapphire Glitter

#0033CC

Lapis on Neptune

#1F22D2

Buddha Gold

#BC9401

Dark Blue

#3601BC

Bondi Blue

#0187BC

Monza

#BC0129

Limeade

#29BC01

Fire

#BC3601

Cornflower Blue

#685CFA

Navy Blue

#000081