#645D57

#645D57

Color Values

HEX

#645D57

RGB

100, 93, 87

HSL

27.7, 7.0%, 36.7%

HSV

27.7, 13.0%, 39.2%

CMYK

0.0%, 7.0%, 13.0%, 60.8%

OKLCH

0.483 0.0131 63.2

Properties

Warm Dark Nearest: RAL 7039 Quartz Grey

Color Harmonies

Complementary

#645D57

#575E64

Analogous

#645758

#646457

#645D57

Triadic

#645D57

#57645D

#5D5764

Split Complementary

#645D57

#576464

#575864

Tetradic

#645D57

#586457

#575E64

#645764

Color Blindness Simulation

Original

#645D57

Protanopia

#616158

Deuteranopia

#616259

Tritanopia

#645A5A

Achromatopsia

#5E5E5E

CSS Usage

background-color: #645D57;
color: #645D57;
border-color: #645D57;
Nearest Tailwind: Stone 600 #57534E

Tailwind Shades

50
#F8F7F7
100
#EEEDEC
200
#DEDBD9
300
#C6C1BE
400
#A7A09A
500
#887F77
600
#6D655F
700
#57514C
800
#443F3B
900
#34302D
950
#211E1D

Contrast Checker

Text on white

6.47:1

AA Pass AAA Fail

Text on black

3.25:1

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