#666B8C

#666B8C

Color Values

HEX

#666B8C

RGB

102, 107, 140

HSL

232.1, 15.7%, 47.5%

HSV

232.1, 27.1%, 54.9%

CMYK

27.1%, 23.6%, 0.0%, 45.1%

OKLCH

0.5362 0.052 277.8

Properties

Cool Dark Nearest: RAL 5014 Pigeon Blue

Color Harmonies

Complementary

#666B8C

#8C8766

Analogous

#667E8C

#74668C

#666B8C

Triadic

#666B8C

#8C666B

#6B8C66

Split Complementary

#666B8C

#8C7466

#7E8C66

Tetradic

#666B8C

#8C667E

#8C8766

#668C74

Color Blindness Simulation

Original

#666B8C

Protanopia

#686884

Deuteranopia

#686882

Tritanopia

#667E7C

Achromatopsia

#6C6C6C

CSS Usage

background-color: #666B8C;
color: #666B8C;
border-color: #666B8C;
Nearest Tailwind: Slate 500 #64748B

Tailwind Shades

50
#F6F7F8
100
#EBEBF0
200
#D6D7E1
300
#B8BBCB
400
#9296AF
500
#6B7194
600
#565A76
700
#45485E
800
#36384A
900
#2A2B37
950
#1A1B23

Contrast Checker

Text on white

5.19:1

AA Pass AAA Fail

Text on black

4.05:1

AA Fail AAA Fail

Related Articles

Tutorials

Responsive Color: Adapting Colors for Different Screens

Jan 23, 2026
Tutorials

Color for Data Storytelling: Beyond Default Chart Colors

Jan 21, 2026
Tutorials

How to Choose Brand Colors: A Step-by-Step Guide

Jan 18, 2026