#666AF4

#666AF4

Color Values

HEX

#666AF4

RGB

102, 106, 244

HSL

238.3, 86.6%, 67.8%

HSV

238.3, 58.2%, 95.7%

CMYK

58.2%, 56.6%, 0.0%, 4.3%

OKLCH

0.5966 0.2024 277.1

Properties

Cool Light Nearest: slateblue 2

Color Harmonies

Complementary

#666AF4

#F4F066

Analogous

#66B1F4

#A966F4

#666AF4

Triadic

#666AF4

#F4666A

#6AF466

Split Complementary

#666AF4

#F4A966

#B1F466

Tetradic

#666AF4

#F466B1

#F4F066

#66F4A9

Color Blindness Simulation

Original

#666AF4

Protanopia

#6868D3

Deuteranopia

#6867CB

Tritanopia

#66B8B2

Achromatopsia

#737373

CSS Usage

background-color: #666AF4;
color: #666AF4;
border-color: #666AF4;
Nearest Tailwind: Indigo 500 #6366F1

Tailwind Shades

50
#F2F2FD
100
#E0E1FA
200
#BCBEFA
300
#8D90F7
400
#4F54F2
500
#1117EE
600
#0E13BE
700
#0B0F98
800
#090C77
900
#0B0D56
950
#070836

Contrast Checker

Text on white

4.26:1

AA Fail AAA Fail

Text on black

4.93:1

AA Pass AAA Fail

Related Articles

Tutorials

CSS color-mix(): Blend Colors Natively in the Browser

Jan 26, 2026
Tutorials

Building a Color Picker Web Component from Scratch

Jan 21, 2026
Tutorials

Perceptual Color Spaces: Lab, LCH, Oklab, OKLCH

Jan 15, 2026