#664C71

#664C71

Color Values

HEX

#664C71

RGB

102, 76, 113

HSL

282.2, 19.6%, 37.1%

HSV

282.2, 32.7%, 44.3%

CMYK

9.7%, 32.7%, 0.0%, 55.7%

OKLCH

0.4585 0.0666 315.6

Properties

Cool Dark Nearest: RAL 4005 Blue Lilac

Color Harmonies

Complementary

#664C71

#57714C

Analogous

#544C71

#714C6A

#664C71

Triadic

#664C71

#71664C

#4C7166

Split Complementary

#664C71

#6A714C

#4C7154

Tetradic

#664C71

#71544C

#57714C

#4C6A71

Color Blindness Simulation

Original

#664C71

Protanopia

#5B5B68

Deuteranopia

#5C5E66

Tritanopia

#65615F

Achromatopsia

#545454

CSS Usage

background-color: #664C71;
color: #664C71;
border-color: #664C71;
Nearest Tailwind: Slate 600 #475569

Tailwind Shades

50
#F8F6F9
100
#EEEAF0
200
#DED4E2
300
#C7B6CE
400
#A88EB3
500
#8A6798
600
#6E527A
700
#584262
800
#45334C
900
#342839
950
#211924

Contrast Checker

Text on white

7.4:1

AA Pass AAA Pass

Text on black

2.84:1

AA Fail AAA Fail

Related Articles

Tutorials

Building a Color Picker Web Component from Scratch

Feb 20, 2026
Tutorials

Web Color Performance: Gradients, Shadows, and Filters

Feb 19, 2026
Tutorials

Tailwind CSS Colors: Complete Shade System Guide

Feb 19, 2026