#3771BC

#3771BC

Color Values

HEX

#3771BC

RGB

55, 113, 188

HSL

213.8, 54.7%, 47.6%

HSV

213.8, 70.7%, 73.7%

CMYK

70.7%, 39.9%, 0.0%, 26.3%

OKLCH

0.5472 0.1322 255.9

Properties

Cool Dark Nearest: NCS S 1060-B Bright Blue

Color Harmonies

Complementary

#3771BC

#BC8237

Analogous

#37B3BC

#3F37BC

#3771BC

Triadic

#3771BC

#BC3771

#71BC37

Split Complementary

#3771BC

#BC3F37

#B3BC37

Tetradic

#3771BC

#BC37B3

#BC8237

#37BC3F

Color Blindness Simulation

Original

#3771BC

Protanopia

#5051AA

Deuteranopia

#4D48A6

Tritanopia

#3A9C98

Achromatopsia

#6A6A6A

CSS Usage

background-color: #3771BC;
color: #3771BC;
border-color: #3771BC;
Nearest Tailwind: Sky 600 #0284C7

Tailwind Shades

50
#F4F7FB
100
#E5ECF5
200
#C8D9EF
300
#A0BEE3
400
#6D9AD4
500
#3A77C5
600
#2E5F9E
700
#254C7E
800
#1D3B63
900
#192D48
950
#101D2E

Contrast Checker

Text on white

4.94:1

AA Pass AAA Fail

Text on black

4.25:1

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