#3F686F

#3F686F

Color Values

HEX

#3F686F

RGB

63, 104, 111

HSL

188.8, 27.6%, 34.1%

HSV

188.8, 43.2%, 43.5%

CMYK

43.2%, 6.3%, 0.0%, 56.5%

OKLCH

0.4899 0.0472 209.5

Properties

Cool Dark Nearest: RAL 5021 Water Blue

Color Harmonies

Complementary

#3F686F

#6F463F

Analogous

#3F6F5E

#3F506F

#3F686F

Triadic

#3F686F

#6F3F68

#686F3F

Split Complementary

#3F686F

#6F3F50

#6F5E3F

Tetradic

#3F686F

#5E3F6F

#6F463F

#506F3F

Color Blindness Simulation

Original

#3F686F

Protanopia

#51516D

Deuteranopia

#4E4B6D

Tritanopia

#416C6C

Achromatopsia

#606060

CSS Usage

background-color: #3F686F;
color: #3F686F;
border-color: #3F686F;
Nearest Tailwind: Cyan 800 #155E75

Tailwind Shades

50
#F6F9F9
100
#E9F0F1
200
#D1E2E5
300
#B1CED3
400
#87B3BB
500
#5C98A3
600
#4A7A82
700
#3B6268
800
#2E4C51
900
#24393C
950
#172426

Contrast Checker

Text on white

6.14:1

AA Pass AAA Fail

Text on black

3.42:1

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