#666DDB

#666DDB

Color Values

HEX

#666DDB

RGB

102, 109, 219

HSL

236.4, 61.9%, 62.9%

HSV

236.4, 53.4%, 85.9%

CMYK

53.4%, 50.2%, 0.0%, 14.1%

OKLCH

0.5846 0.1652 277.3

Properties

Cool Light Nearest: royalblue

Color Harmonies

Complementary

#666DDB

#DBD466

Analogous

#66A7DB

#9966DB

#666DDB

Triadic

#666DDB

#DB666D

#6DDB66

Split Complementary

#666DDB

#DB9966

#A7DB66

Tetradic

#666DDB

#DB66A7

#DBD466

#66DB99

Color Blindness Simulation

Original

#666DDB

Protanopia

#6969C0

Deuteranopia

#6968BA

Tritanopia

#66ABA7

Achromatopsia

#737373

CSS Usage

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

Tailwind Shades

50
#F3F4FB
100
#E4E5F7
200
#C5C8F1
300
#9CA0E8
400
#666DDB
500
#313ACE
600
#272EA5
700
#1F2584
800
#181D67
900
#15194B
950
#0E1030

Contrast Checker

Text on white

4.4:1

AA Fail AAA Fail

Text on black

4.78:1

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