#42b5a1

Keppel

Closest match (98% match)

Color formats

RGB

rgb(66, 181, 161)

Red, Green, Blue components

HSL

hsl(170, 47%, 48%)

Hue, Saturation, Lightness

CMYK

cmyk(64, 0, 11, 29)

Print color encoding

Luminance

0.368

Relative luminance

Variations

Shades (Darkening)

Tints (Lightening)

Tones (Reduced saturation)

Harmonies

Click the color slices to copy the code.

Complementary (Opposite)

#42b5a1

#b54256

Analogous (Adjacent)

#42b568

#42b5a1

#428fb5

Triadic

#42b5a1

#a142b5

#b5a142

Split complementary

#42b5a1

#b5428f

#b56842

Complete conversion table

HEX

#42B5A1

RGB

rgb(66,181,161)

RGBA

rgba(66,181,161, 1)

HSL

hsl(169.57,46.56%,48.43%)

OKLCH (Modern CSS)

oklch(0.70 0.11 179.4)

CSS Variable

--color: #42b5a1;

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

2.51

Small text (14pt)

The quick brown fox jumps over...

AAA

Large text or UI (18pt Bold)

AAA

On black background

8.36

Small text (14pt)

The quick brown fox jumps over...

AAA

Large text or UI (18pt Bold)

AAA

Color blindness simulator

ORIG

SIM

Protanopia (red)

#42b5a1#acaca1

ORIG

SIM

Deuteranopia (green)

#42b5a1#645fa1

ORIG

SIM

Tritanopia (blue)

#42b5a1#48717f

ORIG

SIM

Monochrome (color blind)

#42b5a1#a3a3a3

Mixing guide

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

MIXING PALETTE

66%

27%

RYB PIGMENTS

Ultramarine blue

Pigment

66%

Cadmium yellow

Pigment

27%

Ivory black

Pigment

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

Green hue

495–570 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)

36.8%

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.

Ambrosial Oceanside

#47AE9C

Water Park

#54AF9C

Waterfall

#3AB0A2

Hole In One

#4AAE97

Hippie Pink

#B54256

Steel Blue

#428FB5

Chateau Green

#42B568

Studio

#A142B5

Tussock

#B5A142

Mulberry

#B5428F

Spray

#83F2DC

Pine Green

#007B6A