#367fb3

Boston Blue

Closest match (91% match)

Color formats

RGB

rgb(54, 127, 179)

Red, Green, Blue components

HSL

hsl(205, 54%, 46%)

Hue, Saturation, Lightness

CMYK

cmyk(70, 29, 0, 30)

Print color encoding

Luminance

0.192

Relative luminance

Variations

Shades (Darkening)

Tints (Lightening)

Tones (Reduced saturation)

Harmonies

Click the color slices to copy the code.

Complementary (Opposite)

#367fb3

#b36a36

Analogous (Adjacent)

#36b3a9

#367fb3

#3640b3

Triadic

#367fb3

#b3367f

#7fb336

Split complementary

#367fb3

#b33640

#b3a936

Complete conversion table

HEX

#367FB3

RGB

rgb(54,127,179)

RGBA

rgba(54,127,179, 1)

HSL

hsl(204.96,53.65%,45.69%)

OKLCH (Modern CSS)

oklch(0.57 0.11 242.9)

CSS Variable

--color: #367fb3;

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

4.34

Small text (14pt)

The quick brown fox jumps over...

AAA

Large text or UI (18pt Bold)

AAA

On black background

4.84

Small text (14pt)

The quick brown fox jumps over...

AAA

Large text or UI (18pt Bold)

AAA

Color blindness simulator

ORIG

SIM

Protanopia (red)

#367fb3#9696b3

ORIG

SIM

Deuteranopia (green)

#367fb3#645cb3

ORIG

SIM

Tritanopia (blue)

#367fb3#3a535d

ORIG

SIM

Monochrome (color blind)

#367fb3#797979

Mixing guide

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

MIXING PALETTE

73%

15%

12%

RYB PIGMENTS

Ultramarine blue

Pigment

73%

Ivory black

Pigment

15%

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)

19.2%

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.

Honolulu Blue

#007FBF

Haddock’s Sweater

#277ABA

King Triton

#3C85BE

Mediterranean Blue

#1682B9

Copper

#B36A36

Governor Bay

#3640B3

Keppel

#36B3A9

Medium Red Violet

#B3367F

Sushi

#7FB336

Medium Carmine

#B33640

Jordy Blue

#78B8F0

Regal Blue

#004B7A