#646D7B

#646D7B

Color Values

HEX

#646D7B

RGB

100, 109, 123

HSL

216.5, 10.3%, 43.7%

HSV

216.5, 18.7%, 48.2%

CMYK

18.7%, 11.4%, 0.0%, 51.8%

OKLCH

0.5321 0.0246 259.2

Properties

Cool Dark Nearest: RAL 4012 Pearl Blackberry

Color Harmonies

Complementary

#646D7B

#7B7264

Analogous

#64787B

#66647B

#646D7B

Triadic

#646D7B

#7B646D

#6D7B64

Split Complementary

#646D7B

#7B6664

#787B64

Tetradic

#646D7B

#7B6478

#7B7264

#647B66

Color Blindness Simulation

Original

#646D7B

Protanopia

#686878

Deuteranopia

#676777

Tritanopia

#647574

Achromatopsia

#6C6C6C

CSS Usage

background-color: #646D7B;
color: #646D7B;
border-color: #646D7B;
Nearest Tailwind: Gray 500 #6B7280

Tailwind Shades

50
#F7F7F8
100
#ECEDEF
200
#D8DBDF
300
#BBC0C8
400
#979FAA
500
#727D8D
600
#5B6471
700
#49505A
800
#393E46
900
#2C2F35
950
#1C1E21

Contrast Checker

Text on white

5.23:1

AA Pass AAA Fail

Text on black

4.02:1

AA Fail AAA Fail

Related Articles

Tutorials

Responsive Color: Adapting Colors for Different Screens

Jan 23, 2026
Tutorials

Color for Data Storytelling: Beyond Default Chart Colors

Jan 21, 2026
Tutorials

How to Choose Brand Colors: A Step-by-Step Guide

Jan 18, 2026