#3781BC

#3781BC

Color Values

HEX

#3781BC

RGB

55, 129, 188

HSL

206.6, 54.7%, 47.6%

HSV

206.6, 70.7%, 73.7%

CMYK

70.7%, 31.4%, 0.0%, 26.3%

OKLCH

0.584 0.1165 245.8

Properties

Cool Light Nearest: RAL 5012 Light Blue

Color Harmonies

Complementary

#3781BC

#BC7237

Analogous

#37BCB4

#373FBC

#3781BC

Triadic

#3781BC

#BC3781

#81BC37

Split Complementary

#3781BC

#BC373F

#BCB437

Tetradic

#3781BC

#B437BC

#BC7237

#3FBC37

Color Blindness Simulation

Original

#3781BC

Protanopia

#5758AE

Deuteranopia

#534DAA

Tritanopia

#3BA2A0

Achromatopsia

#767676

CSS Usage

background-color: #3781BC;
color: #3781BC;
border-color: #3781BC;
Nearest Tailwind: Sky 600 #0284C7

Tailwind Shades

50
#F4F8FB
100
#E5EEF5
200
#C8DEEF
300
#A0C6E3
400
#6DA6D4
500
#3A87C5
600
#2E6C9E
700
#25577E
800
#1D4463
900
#193348
950
#10202E

Contrast Checker

Text on white

4.18:1

AA Fail AAA Fail

Text on black

5.03:1

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