#645D6B

#645D6B

Color Values

HEX

#645D6B

RGB

100, 93, 107

HSL

270.0, 7.0%, 39.2%

HSV

270.0, 13.1%, 42.0%

CMYK

6.5%, 13.1%, 0.0%, 58.0%

OKLCH

0.4899 0.0236 307.9

Properties

Cool Dark Nearest: RAL 4012 Pearl Blackberry

Color Harmonies

Complementary

#645D6B

#646B5D

Analogous

#5D5D6B

#6B5D6B

#645D6B

Triadic

#645D6B

#6B645D

#5D6B64

Split Complementary

#645D6B

#6B6B5D

#5D6B5D

Tetradic

#645D6B

#6B5D5D

#646B5D

#5D6B6B

Color Blindness Simulation

Original

#645D6B

Protanopia

#616168

Deuteranopia

#616267

Tritanopia

#646564

Achromatopsia

#5F5F5F

CSS Usage

background-color: #645D6B;
color: #645D6B;
border-color: #645D6B;
Nearest Tailwind: Zinc 600 #52525B

Tailwind Shades

50
#F7F7F8
100
#EDECEE
200
#DBD9DE
300
#C2BEC6
400
#A19AA7
500
#807788
600
#665F6D
700
#524C57
800
#403B44
900
#302D34
950
#1F1D21

Contrast Checker

Text on white

6.33:1

AA Pass AAA Fail

Text on black

3.32:1

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