#3666AB

#3666AB

Color Values

HEX

#3666AB

RGB

54, 102, 171

HSL

215.4, 52.0%, 44.1%

HSV

215.4, 68.4%, 67.1%

CMYK

68.4%, 40.4%, 0.0%, 32.9%

OKLCH

0.5114 0.1218 257.7

Properties

Cool Dark Nearest: RAL 5015 Sky Blue

Color Harmonies

Complementary

#3666AB

#AB7B36

Analogous

#36A0AB

#4136AB

#3666AB

Triadic

#3666AB

#AB3666

#66AB36

Split Complementary

#3666AB

#AB4136

#A0AB36

Tetradic

#3666AB

#AB36A0

#AB7B36

#36AB41

Color Blindness Simulation

Original

#3666AB

Protanopia

#4B4B9A

Deuteranopia

#484496

Tritanopia

#388D8A

Achromatopsia

#616161

CSS Usage

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

Tailwind Shades

50
#F4F7FB
100
#E5ECF5
200
#C9D8EE
300
#A2BCE2
400
#7098D2
500
#3D74C2
600
#315C9B
700
#274A7C
800
#1F3A61
900
#1A2C47
950
#101C2D

Contrast Checker

Text on white

5.76:1

AA Pass AAA Fail

Text on black

3.65:1

AA Fail 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