#646B7A

#646B7A

Color Values

HEX

#646B7A

RGB

100, 107, 122

HSL

220.9, 9.9%, 43.5%

HSV

220.9, 18.0%, 47.8%

CMYK

18.0%, 12.3%, 0.0%, 52.2%

OKLCH

0.5271 0.0251 265.6

Properties

Cool Dark Nearest: RAL 4012 Pearl Blackberry

Color Harmonies

Complementary

#646B7A

#7A7364

Analogous

#64767A

#68647A

#646B7A

Triadic

#646B7A

#7A646B

#6B7A64

Split Complementary

#646B7A

#7A6864

#767A64

Tetradic

#646B7A

#7A6476

#7A7364

#647A68

Color Blindness Simulation

Original

#646B7A

Protanopia

#676776

Deuteranopia

#676676

Tritanopia

#647473

Achromatopsia

#6B6B6B

CSS Usage

background-color: #646B7A;
color: #646B7A;
border-color: #646B7A;
Nearest Tailwind: Gray 500 #6B7280

Tailwind Shades

50
#F7F7F8
100
#ECEDEF
200
#D8DADF
300
#BCC0C8
400
#979DAA
500
#737B8C
600
#5C6270
700
#4A4F5A
800
#393D46
900
#2C2F35
950
#1C1E21

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

CSS color-mix(): Blend Colors Natively in the Browser

Jan 26, 2026
Tutorials

Building a Color Picker Web Component from Scratch

Jan 21, 2026
Tutorials

Perceptual Color Spaces: Lab, LCH, Oklab, OKLCH

Jan 15, 2026