#3b99af

Boston Blue

Closest match (94% match)

Color formats

RGB

rgb(59, 153, 175)

Red, Green, Blue components

HSL

hsl(191, 50%, 46%)

Hue, Saturation, Lightness

CMYK

cmyk(66, 13, 0, 31)

Print color encoding

Luminance

0.268

Relative luminance

Variations

Shades (Darkening)

Tints (Lightening)

Tones (Reduced saturation)

Harmonies

Click the color slices to copy the code.

Complementary (Opposite)

#3b99af

#af513b

Analogous (Adjacent)

#3baf8b

#3b99af

#3b5faf

Triadic

#3b99af

#af3b99

#99af3b

Split complementary

#3b99af

#af3b5f

#af8b3b

Complete conversion table

HEX

#3B99AF

RGB

rgb(59,153,175)

RGBA

rgba(59,153,175, 1)

HSL

hsl(191.38,49.57%,45.88%)

OKLCH (Modern CSS)

oklch(0.64 0.09 216.1)

CSS Variable

--color: #3b99af;

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

3.30

Small text (14pt)

The quick brown fox jumps over...

AAA

Large text or UI (18pt Bold)

AAA

On black background

6.36

Small text (14pt)

The quick brown fox jumps over...

AAA

Large text or UI (18pt Bold)

AAA

Color blindness simulator

ORIG

SIM

Protanopia (red)

#3b99af#a3a3af

ORIG

SIM

Deuteranopia (green)

#3b99af#655eaf

ORIG

SIM

Tritanopia (blue)

#3b99af#40616d

ORIG

SIM

Monochrome (color blind)

#3b99af#8d8d8d

Mixing guide

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

MIXING PALETTE

68%

17%

15%

RYB PIGMENTS

Ultramarine blue

Pigment

68%

Cadmium yellow

Pigment

17%

Ivory black

Pigment

15%

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

Cyan hue

485–500 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)

26.8%

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.

Rainy Mood

#4499AA

Blue Moon

#3992A8

Munsell Blue

#0093AF

Oasis

#0092A3

Brown Rust

#AF513B

Azure

#3B5FAF

Keppel

#3BAF8B

Medium Red Violet

#AF3B99

Sushi

#99AF3B

Night Shadz

#AF3B5F

Sky Blue

#7CD4EB

Orient

#006276