#646D7F

#646D7F

Color Values

HEX

#646D7F

RGB

100, 109, 127

HSL

220.0, 11.9%, 44.5%

HSV

220.0, 21.3%, 49.8%

CMYK

21.3%, 14.2%, 0.0%, 50.2%

OKLCH

0.5336 0.0303 264.3

Properties

Cool Dark Nearest: lightsteelblue 4

Color Harmonies

Complementary

#646D7F

#7F7664

Analogous

#647A7F

#68647F

#646D7F

Triadic

#646D7F

#7F646D

#6D7F64

Split Complementary

#646D7F

#7F6864

#7A7F64

Tetradic

#646D7F

#7F647A

#7F7664

#647F68

Color Blindness Simulation

Original

#646D7F

Protanopia

#68687B

Deuteranopia

#67677A

Tritanopia

#647776

Achromatopsia

#6C6C6C

CSS Usage

background-color: #646D7F;
color: #646D7F;
border-color: #646D7F;
Nearest Tailwind: Gray 500 #6B7280

Tailwind Shades

50
#F7F7F8
100
#EBEDEF
200
#D7DAE0
300
#BBBFC9
400
#959DAC
500
#707A8F
600
#5A6272
700
#484E5B
800
#383D47
900
#2B2F36
950
#1B1E22

Contrast Checker

Text on white

5.2:1

AA Pass AAA Fail

Text on black

4.04:1

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