#404347

#404347

Color Values

HEX

#404347

RGB

64, 67, 71

HSL

214.3, 5.2%, 26.5%

HSV

214.3, 9.9%, 27.8%

CMYK

9.9%, 5.6%, 0.0%, 72.2%

OKLCH

0.3815 0.0079 255.5

Properties

Cool Dark Nearest: RAL 7031 Blue Grey

Color Harmonies

Complementary

#404347

#474440

Analogous

#404747

#414047

#404347

Triadic

#404347

#474043

#434740

Split Complementary

#404347

#474140

#474740

Tetradic

#404347

#474047

#474440

#404741

Color Blindness Simulation

Original

#404347

Protanopia

#414146

Deuteranopia

#414146

Tritanopia

#404545

Achromatopsia

#434343

CSS Usage

background-color: #404347;
color: #404347;
border-color: #404347;
Nearest Tailwind: Zinc 700 #3F3F46

Tailwind Shades

50
#F7F7F8
100
#ECEDEE
200
#D9DBDD
300
#BFC1C5
400
#9CA0A6
500
#797F86
600
#61656B
700
#4D5156
800
#3C3F43
900
#2E3033
950
#1D1E20

Contrast Checker

Text on white

9.94:1

AA Pass AAA Pass

Text on black

2.11:1

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