#00178d

Resolution Blue

Closest match (97% match)

Color formats

RGB

rgb(0, 23, 141)

Red, Green, Blue components

HSL

hsl(230, 100%, 28%)

Hue, Saturation, Lightness

CMYK

cmyk(100, 84, 0, 45)

Print color encoding

Luminance

0.025

Relative luminance

Variations

Shades (Darkening)

Tints (Lightening)

Tones (Reduced saturation)

Harmonies

Click the color slices to copy the code.

Complementary (Opposite)

#00178d

#8d7600

Analogous (Adjacent)

#005e8d

#00178d

#2f008d

Triadic

#00178d

#8d0017

#178d00

Split complementary

#00178d

#8d2f00

#5e8d00

Complete conversion table

HEX

#00178D

RGB

rgb(0,23,141)

RGBA

rgba(0,23,141, 1)

HSL

hsl(230.21,100%,27.65%)

OKLCH (Modern CSS)

oklch(0.31 0.19 264.1)

CSS Variable

--color: #00178d;

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

13.93

Small text (14pt)

The quick brown fox jumps over...

AAA

Large text or UI (18pt Bold)

AAA

On black background

1.51

Small text (14pt)

The quick brown fox jumps over...

AAA

Large text or UI (18pt Bold)

AAA

Color blindness simulator

ORIG

SIM

Protanopia (red)

#00178d#4b4c8d

ORIG

SIM

Deuteranopia (green)

#00178d#342a8d

ORIG

SIM

Tritanopia (blue)

#00178d#010b0c

ORIG

SIM

Monochrome (color blind)

#00178d#2f2748

Mixing guide

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

MIXING PALETTE

53%

45%

RYB PIGMENTS

Ultramarine blue

Pigment

53%

Ivory black

Pigment

45%

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)

2.5%

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.

Royal

#0C1793

Galactic Cruise

#111188

Space Exploration

#001199

Nightly Expedition

#221188

Olive

#8D7600

Kingfisher Daisy

#2F008D

Orient

#005E8D

Scarlett

#8D0017

Japanese Laurel

#178D00

Peru Tan

#8D2F00

Indigo

#5A49C8

Stratos

#000056