#3383bc

Boston Blue

Closest match (92% match)

Color formats

RGB

rgb(51, 131, 188)

Red, Green, Blue components

HSL

hsl(205, 57%, 47%)

Hue, Saturation, Lightness

CMYK

cmyk(73, 30, 0, 26)

Print color encoding

Luminance

0.206

Relative luminance

Variations

Shades (Darkening)

Tints (Lightening)

Tones (Reduced saturation)

Harmonies

Click the color slices to copy the code.

Complementary (Opposite)

#3383bc

#bc6c33

Analogous (Adjacent)

#33bcb1

#3383bc

#333ebc

Triadic

#3383bc

#bc3383

#83bc33

Split complementary

#3383bc

#bc333e

#bcb133

Complete conversion table

HEX

#3383BC

RGB

rgb(51,131,188)

RGBA

rgba(51,131,188, 1)

HSL

hsl(204.96,57.32%,46.86%)

OKLCH (Modern CSS)

oklch(0.59 0.12 243.5)

CSS Variable

--color: #3383bc;

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

4.11

Small text (14pt)

The quick brown fox jumps over...

AAA

Large text or UI (18pt Bold)

AAA

On black background

5.11

Small text (14pt)

The quick brown fox jumps over...

AAA

Large text or UI (18pt Bold)

AAA

Color blindness simulator

ORIG

SIM

Protanopia (red)

#3383bc#9c9dbc

ORIG

SIM

Deuteranopia (green)

#3383bc#655cbc

ORIG

SIM

Tritanopia (blue)

#3383bc#37545d

ORIG

SIM

Monochrome (color blind)

#3383bc#7d7d7d

Mixing guide

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

MIXING PALETTE

76%

13%

10%

RYB PIGMENTS

Ultramarine blue

Pigment

76%

Cadmium yellow

Pigment

13%

Ivory black

Pigment

10%

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)

20.6%

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.

King Triton

#3C85BE

Warm Spring

#4286BC

Honolulu Blue

#007FBF

Mediterranean Blue

#1682B9

Copper

#BC6C33

Governor Bay

#333EBC

Puerto Rico

#33BCB1

Medium Red Violet

#BC3383

Sushi

#83BC33

Well Read

#BC333E

Malibu

#77BCF9

Orient

#004E82