#3F81B8

#3F81B8

Color Values

HEX

#3F81B8

RGB

63, 129, 184

HSL

207.3, 49.0%, 48.4%

HSV

207.3, 65.8%, 72.2%

CMYK

65.8%, 29.9%, 0.0%, 27.8%

OKLCH

0.5848 0.1083 246.2

Properties

Cool Light Nearest: RAL 5012 Light Blue

Color Harmonies

Complementary

#3F81B8

#B8763F

Analogous

#3FB8B2

#3F44B8

#3F81B8

Triadic

#3F81B8

#B83F81

#81B83F

Split Complementary

#3F81B8

#B83F44

#B8B23F

Tetradic

#3F81B8

#B23FB8

#B8763F

#44B83F

Color Blindness Simulation

Original

#3F81B8

Protanopia

#5C5CAB

Deuteranopia

#5853A7

Tritanopia

#42A09E

Achromatopsia

#777777

CSS Usage

background-color: #3F81B8;
color: #3F81B8;
border-color: #3F81B8;
Nearest Tailwind: Sky 600 #0284C7

Tailwind Shades

50
#F4F8FB
100
#E6EEF5
200
#CADDED
300
#A4C4E0
400
#72A5CF
500
#4185BE
600
#346A98
700
#2A557A
800
#21435F
900
#1B3246
950
#11202C

Contrast Checker

Text on white

4.16:1

AA Fail AAA Fail

Text on black

5.04:1

AA Pass AAA Fail

Related Articles

Tutorials

CSS color-mix(): Blend Colors Natively in the Browser

Jan 26, 2026
Tutorials

Building a Color Picker Web Component from Scratch

Jan 21, 2026
Tutorials

Perceptual Color Spaces: Lab, LCH, Oklab, OKLCH

Jan 15, 2026