#666EEB

#666EEB

Color Values

HEX

#666EEB

RGB

102, 110, 235

HSL

236.4, 76.9%, 66.1%

HSV

236.4, 56.6%, 92.2%

CMYK

56.6%, 53.2%, 0.0%, 7.8%

OKLCH

0.5973 0.1855 276.5

Properties

Cool Light Nearest: royalblue 2

Color Harmonies

Complementary

#666EEB

#EBE366

Analogous

#66B1EB

#A166EB

#666EEB

Triadic

#666EEB

#EB666E

#6EEB66

Split Complementary

#666EEB

#EBA166

#B1EB66

Tetradic

#666EEB

#EB66B1

#EBE366

#66EBA1

Color Blindness Simulation

Original

#666EEB

Protanopia

#696ACD

Deuteranopia

#6968C6

Tritanopia

#66B5B0

Achromatopsia

#757575

CSS Usage

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

Tailwind Shades

50
#F2F3FC
100
#E1E3F9
200
#C0C3F7
300
#9398F1
400
#5861E9
500
#1D29E2
600
#1821B4
700
#131A90
800
#0F1571
900
#0F1352
950
#090C34

Contrast Checker

Text on white

4.2:1

AA Fail AAA Fail

Text on black

4.99:1

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