#645555

#645555

Color Values

HEX

#645555

RGB

100, 85, 85

HSL

0.0, 8.1%, 36.3%

HSV

0.0, 15.0%, 39.2%

CMYK

0.0%, 15.0%, 15.0%, 60.8%

OKLCH

0.4644 0.0198 17.9

Properties

Warm Dark Nearest: NCS S 7000-N Dark Grey

Color Harmonies

Complementary

#645555

#556464

Analogous

#64555D

#645D55

#645555

Triadic

#645555

#556455

#555564

Split Complementary

#645555

#55645D

#555D64

Tetradic

#645555

#5D6455

#556464

#5D5564

Color Blindness Simulation

Original

#645555

Protanopia

#5E5D55

Deuteranopia

#5E6055

Tritanopia

#635555

Achromatopsia

#585858

CSS Usage

background-color: #645555;
color: #645555;
border-color: #645555;
Nearest Tailwind: Stone 600 #57534E

Tailwind Shades

50
#F8F7F7
100
#EEECEC
200
#DED8D8
300
#C7BDBD
400
#A89999
500
#8A7575
600
#6E5E5E
700
#584B4B
800
#453B3B
900
#342D2D
950
#211C1C

Contrast Checker

Text on white

7.06:1

AA Pass AAA Pass

Text on black

2.97:1

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