#3F504B

#3F504B

Color Values

HEX

#3F504B

RGB

63, 80, 75

HSL

162.4, 11.9%, 28.0%

HSV

162.4, 21.2%, 31.4%

CMYK

21.2%, 0.0%, 6.2%, 68.6%

OKLCH

0.4151 0.0229 175.3

Properties

Cool Dark Nearest: RAL 7012 Basalt Grey

Color Harmonies

Complementary

#3F504B

#503F44

Analogous

#3F5042

#3F4C50

#3F504B

Triadic

#3F504B

#4B3F50

#504B3F

Split Complementary

#3F504B

#503F4C

#50423F

Tetradic

#3F504B

#423F50

#503F44

#4C503F

Color Blindness Simulation

Original

#3F504B

Protanopia

#46474C

Deuteranopia

#45444C

Tritanopia

#404D4D

Achromatopsia

#4C4C4C

CSS Usage

background-color: #3F504B;
color: #3F504B;
border-color: #3F504B;
Nearest Tailwind: Neutral 600 #525252

Tailwind Shades

50
#F7F8F8
100
#EBEFEE
200
#D7E0DD
300
#BBC9C5
400
#95ACA5
500
#708F86
600
#5A726B
700
#485B56
800
#384743
900
#2B3633
950
#1B2220

Contrast Checker

Text on white

8.54:1

AA Pass AAA Pass

Text on black

2.46:1

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