#666BCD

#666BCD

Color Values

HEX

#666BCD

RGB

102, 107, 205

HSL

237.1, 50.7%, 60.2%

HSV

237.1, 50.2%, 80.4%

CMYK

50.2%, 47.8%, 0.0%, 19.6%

OKLCH

0.5716 0.1484 278.4

Properties

Cool Dark Nearest: NCS S 1050-R90B Blue Violet

Color Harmonies

Complementary

#666BCD

#CDC866

Analogous

#669ECD

#9566CD

#666BCD

Triadic

#666BCD

#CD666B

#6BCD66

Split Complementary

#666BCD

#CD9566

#9ECD66

Tetradic

#666BCD

#CD669E

#CDC866

#66CD95

Color Blindness Simulation

Original

#666BCD

Protanopia

#6868B5

Deuteranopia

#6868B0

Tritanopia

#66A39E

Achromatopsia

#717171

CSS Usage

background-color: #666BCD;
color: #666BCD;
border-color: #666BCD;
Nearest Tailwind: Indigo 400 #818CF8

Tailwind Shades

50
#F4F4FB
100
#E5E6F5
200
#C9CBED
300
#A3A6E1
400
#7175D0
500
#3F45C0
600
#32379A
700
#282C7B
800
#1F2360
900
#1A1C47
950
#11122D

Contrast Checker

Text on white

4.62:1

AA Pass AAA Fail

Text on black

4.55:1

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