#3781CE

#3781CE

Color Values

HEX

#3781CE

RGB

55, 129, 206

HSL

210.6, 60.6%, 51.2%

HSV

210.6, 73.3%, 80.8%

CMYK

73.3%, 37.4%, 0.0%, 19.2%

OKLCH

0.5942 0.1388 252.1

Properties

Cool Light Nearest: NCS S 1060-B Bright Blue

Color Harmonies

Complementary

#3781CE

#CE8437

Analogous

#37CCCE

#3937CE

#3781CE

Triadic

#3781CE

#CE3781

#81CE37

Split Complementary

#3781CE

#CE3937

#CCCE37

Tetradic

#3781CE

#CE37CC

#CE8437

#37CE39

Color Blindness Simulation

Original

#3781CE

Protanopia

#5758BB

Deuteranopia

#534DB7

Tritanopia

#3BADA9

Achromatopsia

#777777

CSS Usage

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

Tailwind Shades

50
#F3F7FB
100
#E4EDF6
200
#C6DBF1
300
#9DC1E7
400
#67A0DA
500
#327ECD
600
#2865A4
700
#205183
800
#193F66
900
#16304B
950
#0E1E2F

Contrast Checker

Text on white

4.04:1

AA Fail AAA Fail

Text on black

5.19:1

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