#666CFD

#666CFD

Color Values

HEX

#666CFD

RGB

102, 108, 253

HSL

237.6, 97.4%, 69.6%

HSV

237.6, 59.7%, 99.2%

CMYK

59.7%, 57.3%, 0.0%, 0.8%

OKLCH

0.6068 0.2115 276.3

Properties

Cool Light Nearest: slateblue 1

Color Harmonies

Complementary

#666CFD

#FDF766

Analogous

#66B8FD

#AB66FD

#666CFD

Triadic

#666CFD

#FD666C

#6CFD66

Split Complementary

#666CFD

#FDAB66

#B8FD66

Tetradic

#666CFD

#FD66B8

#FDF766

#66FDAB

Color Blindness Simulation

Original

#666CFD

Protanopia

#6969DA

Deuteranopia

#6868D2

Tritanopia

#66BEB8

Achromatopsia

#757575

CSS Usage

background-color: #666CFD;
color: #666CFD;
border-color: #666CFD;
Nearest Tailwind: Indigo 500 #6366F1

Tailwind Shades

50
#F1F2FE
100
#DEE0FC
200
#B9BBFE
300
#868BFD
400
#454CFD
500
#030DFC
600
#030BC9
700
#0208A1
800
#02077E
900
#06095B
950
#040639

Contrast Checker

Text on white

4.09:1

AA Fail AAA Fail

Text on black

5.13:1

AA Pass 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