#371cbb

Persian Blue

Closest match (93% match)

Color formats

RGB

rgb(55, 28, 187)

Red, Green, Blue components

HSL

hsl(250, 74%, 42%)

Hue, Saturation, Lightness

CMYK

cmyk(71, 85, 0, 27)

Print color encoding

Luminance

0.052

Relative luminance

Variations

Shades (Darkening)

Tints (Lightening)

Tones (Reduced saturation)

Harmonies

Click the color slices to copy the code.

Complementary (Opposite)

#371cbb

#a0bb1c

Analogous (Adjacent)

#1c50bb

#371cbb

#871cbb

Triadic

#371cbb

#bb371c

#1cbb37

Split complementary

#371cbb

#bb871c

#50bb1c

Complete conversion table

HEX

#371CBB

RGB

rgb(55,28,187)

RGBA

rgba(55,28,187, 1)

HSL

hsl(250.19,73.95%,42.16%)

OKLCH (Modern CSS)

oklch(0.40 0.22 276.9)

CSS Variable

--color: #371cbb;

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

10.26

Small text (14pt)

The quick brown fox jumps over...

AAA

Large text or UI (18pt Bold)

AAA

On black background

2.05

Small text (14pt)

The quick brown fox jumps over...

AAA

Large text or UI (18pt Bold)

AAA

Color blindness simulator

ORIG

SIM

Protanopia (red)

#371cbb#6264bb

ORIG

SIM

Deuteranopia (green)

#371cbb#675fbb

ORIG

SIM

Tritanopia (blue)

#371cbb#362529

ORIG

SIM

Monochrome (color blind)

#371cbb#493574

Mixing guide

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

MIXING PALETTE

68%

19%

13%

RYB PIGMENTS

Ultramarine blue

Pigment

68%

Ivory black

Pigment

19%

Cadmium red

Pigment

13%

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)

5.2%

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.

Galactic Highway

#3311BB

Sapphire Splendour

#2425B9

Busty Blue

#3300CC

True Blue

#010FCC

Citron

#A0BB1C

Purple Heart

#871CBB

Persian Blue

#1C50BB

Thunderbird

#BB371C

Malachite

#1CBB37

Mandalay

#BB871C

Cornflower Blue

#7F53F9

Navy Blue

#000080