#666EF3

#666EF3

Color Values

HEX

#666EF3

RGB

102, 110, 243

HSL

236.6, 85.5%, 67.6%

HSV

236.6, 58.0%, 95.3%

CMYK

58.0%, 54.7%, 0.0%, 4.7%

OKLCH

0.603 0.1961 276.2

Properties

Cool Light Nearest: mediumslateblue

Color Harmonies

Complementary

#666EF3

#F3EB66

Analogous

#66B4F3

#A466F3

#666EF3

Triadic

#666EF3

#F3666E

#6EF366

Split Complementary

#666EF3

#F3A466

#B4F366

Tetradic

#666EF3

#F366B4

#F3EB66

#66F3A4

Color Blindness Simulation

Original

#666EF3

Protanopia

#696AD3

Deuteranopia

#6968CB

Tritanopia

#66B9B4

Achromatopsia

#767676

CSS Usage

background-color: #666EF3;
color: #666EF3;
border-color: #666EF3;
Nearest Tailwind: Indigo 500 #6366F1

Tailwind Shades

50
#F2F2FD
100
#E0E2FA
200
#BDC0FA
300
#8D93F6
400
#5059F1
500
#121FED
600
#0F19BD
700
#0C1497
800
#090F76
900
#0B0F56
950
#070A36

Contrast Checker

Text on white

4.13:1

AA Fail AAA Fail

Text on black

5.09:1

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