#63b1bf

Fountain Blue

Closest match (97% match)

Color formats

RGB

rgb(99, 177, 191)

Red, Green, Blue components

HSL

hsl(189, 42%, 57%)

Hue, Saturation, Lightness

CMYK

cmyk(48, 7, 0, 25)

Print color encoding

Luminance

0.379

Relative luminance

Variations

Shades (Darkening)

Tints (Lightening)

Tones (Reduced saturation)

Harmonies

Click the color slices to copy the code.

Complementary (Opposite)

#63b1bf

#bf7163

Analogous (Adjacent)

#63bf9f

#63b1bf

#6383bf

Triadic

#63b1bf

#bf63b1

#b1bf63

Split complementary

#63b1bf

#bf6383

#bf9f63

Complete conversion table

HEX

#63B1BF

RGB

rgb(99,177,191)

RGBA

rgba(99,177,191, 1)

HSL

hsl(189.13,41.82%,56.86%)

OKLCH (Modern CSS)

oklch(0.72 0.08 210.4)

CSS Variable

--color: #63b1bf;

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

2.45

Small text (14pt)

The quick brown fox jumps over...

AAA

Large text or UI (18pt Bold)

AAA

On black background

8.57

Small text (14pt)

The quick brown fox jumps over...

AAA

Large text or UI (18pt Bold)

AAA

Color blindness simulator

ORIG

SIM

Protanopia (red)

#63b1bf#b7b7bf

ORIG

SIM

Deuteranopia (green)

#63b1bf#847fbf

ORIG

SIM

Tritanopia (blue)

#63b1bf#677e8c

ORIG

SIM

Monochrome (color blind)

#63b1bf#a5a5a5

Mixing guide

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

MIXING PALETTE

57%

28%

15%

RYB PIGMENTS

Ultramarine blue

Pigment

57%

Titanium white

Pigment

28%

Cadmium yellow

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)

37.9%

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.

Finnish Fiord

#5DB0BE

High Dive

#59B9CC

Blue Bobbin

#52B4CA

Viking

#4DB1C8

Contessa

#BF7163

Ship Cove

#6383BF

Silver Tree

#63BF9F

Fuchsia Pink

#BF63B1

Wild Willow

#B1BF63

Tapestry

#BF6383

Anakiwa

#A0EDFC

Elm

#227885