#664ea4

Butterfly Bush

Closest match (98% match)

Color formats

RGB

rgb(102, 78, 164)

Red, Green, Blue components

HSL

hsl(257, 36%, 47%)

Hue, Saturation, Lightness

CMYK

cmyk(38, 52, 0, 36)

Print color encoding

Luminance

0.110

Relative luminance

Variations

Shades (Darkening)

Tints (Lightening)

Tones (Reduced saturation)

Harmonies

Click the color slices to copy the code.

Complementary (Opposite)

#664ea4

#8ca44e

Analogous (Adjacent)

#4e61a4

#664ea4

#914ea4

Triadic

#664ea4

#a4664e

#4ea466

Split complementary

#664ea4

#a4914e

#61a44e

Complete conversion table

HEX

#664EA4

RGB

rgb(102,78,164)

RGBA

rgba(102,78,164, 1)

HSL

hsl(256.74,35.54%,47.45%)

OKLCH (Modern CSS)

oklch(0.49 0.13 293.8)

CSS Variable

--color: #664ea4;

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

6.58

Small text (14pt)

The quick brown fox jumps over...

AAA

Large text or UI (18pt Bold)

AAA

On black background

3.19

Small text (14pt)

The quick brown fox jumps over...

AAA

Large text or UI (18pt Bold)

AAA

Color blindness simulator

ORIG

SIM

Protanopia (red)

#664ea4#7475a4

ORIG

SIM

Deuteranopia (green)

#664ea4#7c79a4

ORIG

SIM

Tritanopia (blue)

#664ea4#655159

ORIG

SIM

Monochrome (color blind)

#664ea4#5d5d5d

Mixing guide

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

MIXING PALETTE

67%

22%

12%

RYB PIGMENTS

Ultramarine blue

Pigment

67%

Cadmium red

Pigment

22%

Ivory black

Pigment

12%

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)

11.0%

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.

Prophet Violet

#6F58A6

Royal Lavender

#7851A9

Simply Purple

#715BB1

Poppy Pompadour

#6B3FA0

Chelsea Cucumber

#8CA44E

Affair

#914EA4

San Marino

#4E61A4

Santa Fe

#A4664E

Fruit Salad

#4EA466

Limed Oak

#A4914E

Lavender

#A084E0

Meteorite

#2D1D6B