#001b8f

Resolution Blue

Closest match (97% match)

Color formats

RGB

rgb(0, 27, 143)

Red, Green, Blue components

HSL

hsl(229, 100%, 28%)

Hue, Saturation, Lightness

CMYK

cmyk(100, 81, 0, 44)

Print color encoding

Luminance

0.028

Relative luminance

Variations

Shades (Darkening)

Tints (Lightening)

Tones (Reduced saturation)

Harmonies

Click the color slices to copy the code.

Complementary (Opposite)

#001b8f

#8f7400

Analogous (Adjacent)

#00638f

#001b8f

#2c008f

Triadic

#001b8f

#8f001b

#1b8f00

Split complementary

#001b8f

#8f2c00

#638f00

Complete conversion table

HEX

#001B8F

RGB

rgb(0,27,143)

RGBA

rgba(0,27,143, 1)

HSL

hsl(228.67,100%,28.04%)

OKLCH (Modern CSS)

oklch(0.32 0.19 264.0)

CSS Variable

--color: #001b8f;

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

13.52

Small text (14pt)

The quick brown fox jumps over...

AAA

Large text or UI (18pt Bold)

AAA

On black background

1.55

Small text (14pt)

The quick brown fox jumps over...

AAA

Large text or UI (18pt Bold)

AAA

Color blindness simulator

ORIG

SIM

Protanopia (red)

#001b8f#4e4f8f

ORIG

SIM

Deuteranopia (green)

#001b8f#352b8f

ORIG

SIM

Tritanopia (blue)

#001b8f#010d0e

ORIG

SIM

Monochrome (color blind)

#001b8f#312a49

Mixing guide

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

MIXING PALETTE

53%

44%

RYB PIGMENTS

Ultramarine blue

Pigment

53%

Ivory black

Pigment

44%

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)

2.8%

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

Space Dust

#002299

Galactic Cruise

#111188

Space Exploration

#001199

Olive

#8F7400

Kingfisher Daisy

#2C008F

Bahama Blue

#00638F

Burgundy

#8F001B

Japanese Laurel

#1B8F00

Peru Tan

#8F2C00

Indigo

#5A4CCB

Stratos

#000057