#666DA3

#666DA3

Color Values

HEX

#666DA3

RGB

102, 109, 163

HSL

233.1, 24.9%, 52.0%

HSV

233.1, 37.4%, 63.9%

CMYK

37.4%, 33.1%, 0.0%, 36.1%

OKLCH

0.5515 0.0843 277.6

Properties

Cool Dark Nearest: RAL 4011 Pearl Violet

Color Harmonies

Complementary

#666DA3

#A39C66

Analogous

#668CA3

#7E66A3

#666DA3

Triadic

#666DA3

#A3666D

#6DA366

Split Complementary

#666DA3

#A37E66

#8CA366

Tetradic

#666DA3

#A3668C

#A39C66

#66A37E

Color Blindness Simulation

Original

#666DA3

Protanopia

#696996

Deuteranopia

#696893

Tritanopia

#668C89

Achromatopsia

#6F6F6F

CSS Usage

background-color: #666DA3;
color: #666DA3;
border-color: #666DA3;
Nearest Tailwind: Sky 700 #0369A1

Tailwind Shades

50
#F6F6F9
100
#E9EAF1
200
#D2D4E4
300
#B3B6D1
400
#898FB8
500
#60679F
600
#4D527F
700
#3D4266
800
#303450
900
#26283B
950
#181925

Contrast Checker

Text on white

4.91:1

AA Pass AAA Fail

Text on black

4.28:1

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