#646563

#646563

Color Values

HEX

#646563

RGB

100, 101, 99

HSL

90.0, 1.0%, 39.2%

HSV

90.0, 2.0%, 39.6%

CMYK

1.0%, 0.0%, 2.0%, 60.4%

OKLCH

0.5052 0.0033 128.5

Properties

Cool Dark Nearest: NCS S 6000-N Medium Dark Grey

Color Harmonies

Complementary

#646563

#646365

Analogous

#656563

#636563

#646563

Triadic

#646563

#636465

#656364

Split Complementary

#646563

#636365

#656365

Tetradic

#646563

#636565

#646365

#656363

Color Blindness Simulation

Original

#646563

Protanopia

#646463

Deuteranopia

#646464

Tritanopia

#646464

Achromatopsia

#656565

CSS Usage

background-color: #646563;
color: #646563;
border-color: #646563;
Nearest Tailwind: Neutral 500 #737373

Tailwind Shades

50
#F7F7F7
100
#EDEDED
200
#DBDCDB
300
#C2C2C1
400
#A1A2A0
500
#80817E
600
#666765
700
#525251
800
#40403F
900
#303130
950
#1F1F1E

Contrast Checker

Text on white

5.86:1

AA Pass AAA Fail

Text on black

3.58:1

AA Fail AAA Fail

Related Articles

Color Questions

What Is Pantone? The Universal Color Language

Feb 20, 2026
Color Questions

What Is Metamerism? Why Colors Look Different Under Different Lights

Feb 20, 2026
Color Questions

What Is Luminance? Brightness in Color Science

Feb 20, 2026