#66bcc1

Fountain Blue

Closest match (97% match)

Color formats

RGB

rgb(102, 188, 193)

Red, Green, Blue components

HSL

hsl(183, 42%, 58%)

Hue, Saturation, Lightness

CMYK

cmyk(47, 3, 0, 24)

Print color encoding

Luminance

0.426

Relative luminance

Variations

Shades (Darkening)

Tints (Lightening)

Tones (Reduced saturation)

Harmonies

Click the color slices to copy the code.

Complementary (Opposite)

#66bcc1

#c16b66

Analogous (Adjacent)

#66c199

#66bcc1

#668ec1

Triadic

#66bcc1

#c166bc

#bcc166

Split complementary

#66bcc1

#c1668e

#c19966

Complete conversion table

HEX

#66BCC1

RGB

rgb(102,188,193)

RGBA

rgba(102,188,193, 1)

HSL

hsl(183.3,42.33%,57.84%)

OKLCH (Modern CSS)

oklch(0.74 0.08 200.4)

CSS Variable

--color: #66bcc1;

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

2.20

Small text (14pt)

The quick brown fox jumps over...

AAA

Large text or UI (18pt Bold)

AAA

On black background

9.53

Small text (14pt)

The quick brown fox jumps over...

AAA

Large text or UI (18pt Bold)

AAA

Color blindness simulator

ORIG

SIM

Protanopia (red)

#66bcc1#bebec1

ORIG

SIM

Deuteranopia (green)

#66bcc1#8781c1

ORIG

SIM

Tritanopia (blue)

#66bcc1#6a8494

ORIG

SIM

Monochrome (color blind)

#66bcc1#afafaf

Mixing guide

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

MIXING PALETTE

53%

31%

16%

RYB PIGMENTS

Ultramarine blue

Pigment

53%

Titanium white

Pigment

31%

Cadmium yellow

Pigment

16%

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)

42.6%

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.

Castaway

#6DBAC0

Thalassa

#53B1BA

Glassmith

#46B5C0

Sea Serpent

#4BC7CF

Contessa

#C16B66

Ship Cove

#668EC1

Silver Tree

#66C199

Fuchsia Pink

#C166BC

Wild Willow

#BCC166

Tapestry

#C1668E

Anakiwa

#A3F9FE

Lochinvar

#248287