#66839F

#66839F

Color Values

HEX

#66839F

RGB

102, 131, 159

HSL

209.5, 22.9%, 51.2%

HSV

209.5, 35.8%, 62.4%

CMYK

35.8%, 17.6%, 0.0%, 37.6%

OKLCH

0.5982 0.0543 247.9

Properties

Cool Light Nearest: lightslategrey

Color Harmonies

Complementary

#66839F

#9F8266

Analogous

#669F9F

#66679F

#66839F

Triadic

#66839F

#9F6683

#839F66

Split Complementary

#66839F

#9F6667

#9F9F66

Tetradic

#66839F

#9F669F

#9F8266

#679F66

Color Blindness Simulation

Original

#66839F

Protanopia

#737398

Deuteranopia

#716F97

Tritanopia

#679392

Achromatopsia

#7F7F7F

CSS Usage

background-color: #66839F;
color: #66839F;
border-color: #66839F;
Nearest Tailwind: Slate 500 #64748B

Tailwind Shades

50
#F6F7F9
100
#EAEDF1
200
#D3DBE3
300
#B4C2D0
400
#8BA1B6
500
#62809D
600
#4F667D
700
#3F5264
800
#31404E
900
#26313A
950
#181F25

Contrast Checker

Text on white

3.95:1

AA Fail AAA Fail

Text on black

5.31:1

AA Pass 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