#403637

#403637

Color Values

HEX

#403637

RGB

64, 54, 55

HSL

354.0, 8.5%, 23.1%

HSV

354.0, 15.6%, 25.1%

CMYK

0.0%, 15.6%, 14.1%, 74.9%

OKLCH

0.3439 0.0143 11.0

Properties

Warm Dark Nearest: RAL 8019 Grey Brown

Color Harmonies

Complementary

#403637

#36403F

Analogous

#40363C

#403A36

#403637

Triadic

#403637

#374036

#363740

Split Complementary

#403637

#36403A

#363C40

Tetradic

#403637

#3C4036

#36403F

#3A3640

Color Blindness Simulation

Original

#403637

Protanopia

#3C3C37

Deuteranopia

#3C3D37

Tritanopia

#403737

Achromatopsia

#383838

CSS Usage

background-color: #403637;
color: #403637;
border-color: #403637;
Nearest Tailwind: Stone 700 #44403C

Tailwind Shades

50
#F8F7F7
100
#EEECEC
200
#DED8D9
300
#C7BDBE
400
#A9999A
500
#8A7577
600
#6F5D5F
700
#594B4C
800
#453A3B
900
#342D2D
950
#211C1D

Contrast Checker

Text on white

11.66:1

AA Pass AAA Pass

Text on black

1.8:1

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