#3F4151

#3F4151

Color Values

HEX

#3F4151

RGB

63, 65, 81

HSL

233.3, 12.5%, 28.2%

HSV

233.3, 22.2%, 31.8%

CMYK

22.2%, 19.8%, 0.0%, 68.2%

OKLCH

0.3799 0.0274 279.4

Properties

Cool Dark Nearest: RAL 7015 Slate Grey

Color Harmonies

Complementary

#3F4151

#514F3F

Analogous

#3F4A51

#463F51

#3F4151

Triadic

#3F4151

#513F41

#41513F

Split Complementary

#3F4151

#51463F

#4A513F

Tetradic

#3F4151

#513F4A

#514F3F

#3F5146

Color Blindness Simulation

Original

#3F4151

Protanopia

#40404D

Deuteranopia

#40404C

Tritanopia

#3F4A49

Achromatopsia

#424242

CSS Usage

background-color: #3F4151;
color: #3F4151;
border-color: #3F4151;
Nearest Tailwind: Gray 700 #374151

Tailwind Shades

50
#F7F7F8
100
#EBECEF
200
#D7D8E0
300
#BABCC9
400
#9597AC
500
#70738F
600
#595C73
700
#474A5C
800
#383A48
900
#2B2C36
950
#1B1C22

Contrast Checker

Text on white

10.07:1

AA Pass AAA Pass

Text on black

2.09:1

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