#3666B0

#3666B0

Color Values

HEX

#3666B0

RGB

54, 102, 176

HSL

216.4, 53.0%, 45.1%

HSV

216.4, 69.3%, 69.0%

CMYK

69.3%, 42.0%, 0.0%, 31.0%

OKLCH

0.5145 0.1287 258.8

Properties

Cool Dark Nearest: NCS S 1060-B Bright Blue

Color Harmonies

Complementary

#3666B0

#B08036

Analogous

#36A3B0

#4336B0

#3666B0

Triadic

#3666B0

#B03666

#66B036

Split Complementary

#3666B0

#B04336

#A3B036

Tetradic

#3666B0

#B036A3

#B08036

#36B043

Color Blindness Simulation

Original

#3666B0

Protanopia

#4B4B9E

Deuteranopia

#48449A

Tritanopia

#38908D

Achromatopsia

#616161

CSS Usage

background-color: #3666B0;
color: #3666B0;
border-color: #3666B0;
Nearest Tailwind: Sky 700 #0369A1

Tailwind Shades

50
#F4F7FB
100
#E5EBF5
200
#C8D7EE
300
#A1BBE2
400
#6F96D3
500
#3C71C3
600
#305A9C
700
#26487D
800
#1E3962
900
#192C48
950
#101B2D

Contrast Checker

Text on white

5.7:1

AA Pass AAA Fail

Text on black

3.68:1

AA Fail AAA Fail

Related Articles

Tutorials

Responsive Color: Adapting Colors for Different Screens

Jan 23, 2026
Tutorials

Color for Data Storytelling: Beyond Default Chart Colors

Jan 21, 2026
Tutorials

How to Choose Brand Colors: A Step-by-Step Guide

Jan 18, 2026