#00405c

Astronaut Blue

Closest match (96% match)

Color formats

RGB

rgb(0, 64, 92)

Red, Green, Blue components

HSL

hsl(198, 100%, 18%)

Hue, Saturation, Lightness

CMYK

cmyk(100, 30, 0, 64)

Print color encoding

Luminance

0.044

Relative luminance

Variations

Shades (Darkening)

Tints (Lightening)

Tones (Reduced saturation)

Harmonies

Click the color slices to copy the code.

Complementary (Opposite)

#00405c

#5c1c00

Analogous (Adjacent)

#005c4a

#00405c

#00125c

Triadic

#00405c

#5c0040

#405c00

Split complementary

#00405c

#5c0012

#5c4a00

Complete conversion table

HEX

#00405C

RGB

rgb(0,64,92)

RGBA

rgba(0,64,92, 1)

HSL

hsl(198.26,100%,18.04%)

OKLCH (Modern CSS)

oklch(0.35 0.07 235.4)

CSS Variable

--color: #00405c;

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

11.12

Small text (14pt)

The quick brown fox jumps over...

AAA

Large text or UI (18pt Bold)

AAA

On black background

1.89

Small text (14pt)

The quick brown fox jumps over...

AAA

Large text or UI (18pt Bold)

AAA

Color blindness simulator

ORIG

SIM

Protanopia (red)

#00405c#4c4d5c

ORIG

SIM

Deuteranopia (green)

#00405c#221c5c

ORIG

SIM

Tritanopia (blue)

#00405c#031e22

ORIG

SIM

Monochrome (color blind)

#00405c#3b3b3b

Mixing guide

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

MIXING PALETTE

64%

30%

RYB PIGMENTS

Ivory black

Pigment

64%

Ultramarine blue

Pigment

30%

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

Cyan hue

485–500 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)

4.4%

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.

Maniac Mansion

#004058

Capital Blue

#1A4157

One Year of Rain

#29465B

Seafarer

#204D68

Indian Tan

#5C1C00

Stratos

#00125C

Aqua Deep

#005C4A

Pompadour

#5C0040

Verdun Green

#405C00

Rosewood

#5C0012

Wedgewood

#457493

Midnight

#00122A