#666FCD

#666FCD

Color Values

HEX

#666FCD

RGB

102, 111, 205

HSL

234.8, 50.7%, 60.2%

HSV

234.8, 50.2%, 80.4%

CMYK

50.2%, 45.9%, 0.0%, 19.6%

OKLCH

0.5794 0.143 276.8

Properties

Cool Light Nearest: NCS S 1050-R90B Blue Violet

Color Harmonies

Complementary

#666FCD

#CDC466

Analogous

#66A2CD

#9166CD

#666FCD

Triadic

#666FCD

#CD666F

#6FCD66

Split Complementary

#666FCD

#CD9166

#A2CD66

Tetradic

#666FCD

#CD66A2

#CDC466

#66CD91

Color Blindness Simulation

Original

#666FCD

Protanopia

#6A6AB6

Deuteranopia

#6969B1

Tritanopia

#66A4A0

Achromatopsia

#747474

CSS Usage

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

Tailwind Shades

50
#F4F5FB
100
#E5E7F5
200
#C9CCED
300
#A3A8E1
400
#7179D0
500
#3F4AC0
600
#323B9A
700
#282F7B
800
#1F2560
900
#1A1E47
950
#11132D

Contrast Checker

Text on white

4.45:1

AA Fail AAA Fail

Text on black

4.72:1

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