#666EB1

#666EB1

Color Values

HEX

#666EB1

RGB

102, 110, 177

HSL

233,6, 32,5%, 54,7%

HSV

233,6, 42,4%, 69,4%

CMYK

42,4%, 37,9%, 0,0%, 30,6%

OKLCH

0,561 0,1039 277,3

Properties

Cool Dark Nearest: Indigo

Color Harmonies

Complementary

#666EB1

#B1A966

Analogous

#6693B1

#8366B1

#666EB1

Triadic

#666EB1

#B1666E

#6EB166

Split Complementary

#666EB1

#B18366

#93B166

Tetradic

#666EB1

#B16693

#B1A966

#66B183

Color Blindness Simulation

Original

#666EB1

Protanopia

#696AA1

Deuteranopia

#69689D

Tritanopia

#669491

Achromatopsia

#717171

CSS Usage

background-color: #666EB1;
color: #666EB1;
border-color: #666EB1;
Nearest Tailwind: Sky 700 #0369A1

Tailwind Shades

50
#F5F6F9
100
#E8E9F2
200
#D0D2E7
300
#AEB2D6
400
#8289BF
500
#565FA9
600
#454C87
700
#373D6C
800
#2B2F54
900
#22253F
950
#161828

Contrast Checker

Text on white

4,74:1

AA Pass AAA Fail

Text on black

4,43:1

AA Fail 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