#646D67

#646D67

Color Values

HEX

#646D67

RGB

100, 109, 103

HSL

140.0, 4.3%, 41.0%

HSV

140.0, 8.3%, 42.7%

CMYK

8.3%, 0.0%, 5.5%, 57.3%

OKLCH

0.5251 0.0144 156.7

Properties

Cool Dark Nearest: RAL 7005 Mouse Grey

Color Harmonies

Complementary

#646D67

#6D646A

Analogous

#666D64

#646D6C

#646D67

Triadic

#646D67

#67646D

#6D6764

Split Complementary

#646D67

#6C646D

#6D6466

Tetradic

#646D67

#64666D

#6D646A

#6D6C64

Color Blindness Simulation

Original

#646D67

Protanopia

#686868

Deuteranopia

#676769

Tritanopia

#646A6A

Achromatopsia

#6B6B6B

CSS Usage

background-color: #646D67;
color: #646D67;
border-color: #646D67;
Nearest Tailwind: Neutral 500 #737373

Tailwind Shades

50
#F7F8F7
100
#ECEEED
200
#DADDDB
300
#BFC4C1
400
#9DA59F
500
#7A857E
600
#626A65
700
#4E5550
800
#3D423F
900
#2F3230
950
#1D201E

Contrast Checker

Text on white

5.35:1

AA Pass AAA Fail

Text on black

3.93:1

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