#2178ac

Matisse

Closest match (93% match)

Color formats

RGB

rgb(33, 120, 172)

Red, Green, Blue components

HSL

hsl(202, 68%, 40%)

Hue, Saturation, Lightness

CMYK

cmyk(81, 30, 0, 33)

Print color encoding

Luminance

0.167

Relative luminance

Variations

Shades (Darkening)

Tints (Lightening)

Tones (Reduced saturation)

Harmonies

Click the color slices to copy the code.

Complementary (Opposite)

#2178ac

#ac5521

Analogous (Adjacent)

#21ac9b

#2178ac

#2132ac

Triadic

#2178ac

#ac2178

#78ac21

Split complementary

#2178ac

#ac2132

#ac9b21

Complete conversion table

HEX

#2178AC

RGB

rgb(33,120,172)

RGBA

rgba(33,120,172, 1)

HSL

hsl(202.45,67.8%,40.2%)

OKLCH (Modern CSS)

oklch(0.55 0.11 240.5)

CSS Variable

--color: #2178ac;

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

4.83

Small text (14pt)

The quick brown fox jumps over...

AAA

Large text or UI (18pt Bold)

AAA

On black background

4.35

Small text (14pt)

The quick brown fox jumps over...

AAA

Large text or UI (18pt Bold)

AAA

Color blindness simulator

ORIG

SIM

Protanopia (red)

#2178ac#8f8fac

ORIG

SIM

Deuteranopia (green)

#2178ac#544bac

ORIG

SIM

Tritanopia (blue)

#2178ac#25474f

ORIG

SIM

Monochrome (color blind)

#2178ac#727272

Mixing guide

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

MIXING PALETTE

62%

26%

12%

RYB PIGMENTS

Ultramarine blue

Pigment

62%

Ivory black

Pigment

26%

Cadmium yellow

Pigment

12%

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)

16.7%

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.

Brilliant Blue

#0075B3

Cloisonné

#0773AF

Haddock’s Sweater

#277ABA

Jacuzzi

#007CAC

Desert

#AC5521

Persian Blue

#2132AC

Jungle Green

#21AC9A

Hibiscus

#AC2178

Citron

#78AC21

Mexican Red

#AC2132

Cornflower Blue

#69B0E8

Regal Blue

#004473