#666DDA

#666DDA

Color Values

HEX

#666DDA

RGB

102, 109, 218

HSL

236.4, 61.1%, 62.7%

HSV

236.4, 53.2%, 85.5%

CMYK

53.2%, 50.0%, 0.0%, 14.5%

OKLCH

0.5839 0.1638 277.3

Properties

Cool Light Nearest: royalblue 3

Color Harmonies

Complementary

#666DDA

#DAD366

Analogous

#66A7DA

#9966DA

#666DDA

Triadic

#666DDA

#DA666D

#6DDA66

Split Complementary

#666DDA

#DA9966

#A7DA66

Tetradic

#666DDA

#DA66A7

#DAD366

#66DA99

Color Blindness Simulation

Original

#666DDA

Protanopia

#6969C0

Deuteranopia

#6968B9

Tritanopia

#66ABA6

Achromatopsia

#737373

CSS Usage

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

Tailwind Shades

50
#F3F4FB
100
#E4E5F6
200
#C5C8F1
300
#9CA1E7
400
#676EDA
500
#323BCD
600
#282FA4
700
#202683
800
#191D67
900
#16194B
950
#0E102F

Contrast Checker

Text on white

4.41:1

AA Fail AAA Fail

Text on black

4.76:1

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