#042d45

Blue Whale

Closest match (97% match)

Color formats

RGB

rgb(4, 45, 69)

Red, Green, Blue components

HSL

hsl(202, 89%, 14%)

Hue, Saturation, Lightness

CMYK

cmyk(94, 35, 0, 73)

Print color encoding

Luminance

0.023

Relative luminance

Variations

Shades (Darkening)

Tints (Lightening)

Tones (Reduced saturation)

Harmonies

Click the color slices to copy the code.

Complementary (Opposite)

#042d45

#451c04

Analogous (Adjacent)

#04453d

#042d45

#040c45

Triadic

#042d45

#45042d

#2d4504

Split complementary

#042d45

#45040c

#453d04

Complete conversion table

HEX

#042D45

RGB

rgb(4,45,69)

RGBA

rgba(4,45,69, 1)

HSL

hsl(202.15,89.04%,14.31%)

OKLCH (Modern CSS)

oklch(0.28 0.06 240.4)

CSS Variable

--color: #042d45;

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

14.32

Small text (14pt)

The quick brown fox jumps over...

AAA

Large text or UI (18pt Bold)

AAA

On black background

1.47

Small text (14pt)

The quick brown fox jumps over...

AAA

Large text or UI (18pt Bold)

AAA

Color blindness simulator

ORIG

SIM

Protanopia (red)

#042d45#383845

ORIG

SIM

Deuteranopia (green)

#042d45#1c1845

ORIG

SIM

Tritanopia (blue)

#042d45#06171a

ORIG

SIM

Monochrome (color blind)

#042d45#2a2a2a

Mixing guide

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

MIXING PALETTE

74%

22%

RYB PIGMENTS

Ivory black

Pigment

74%

Ultramarine blue

Pigment

22%

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)

2.3%

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.

Sea of Stars

#0B334D

Beyond the Stars

#0A3251

Midnight Dreams

#002233

Midnight Ocean

#0F2D4D

Bracken

#451C04

Deep Cove

#040C45

Evening Sea

#04453D

Barossa

#45042D

Madras

#2D4504

Rustic Red

#45040C

Blue Bayoux

#3F5E79

Black Russian

#000018