#555B64

#555B64

Color Values

HEX

#555B64

RGB

85, 91, 100

HSL

216.0, 8.1%, 36.3%

HSV

216.0, 15.0%, 39.2%

CMYK

15.0%, 9.0%, 0.0%, 60.8%

OKLCH

0.4691 0.0164 258.4

Properties

Cool Dark Nearest: RAL 7024 Graphite Grey

Color Harmonies

Complementary

#555B64

#645E55

Analogous

#556364

#575564

#555B64

Triadic

#555B64

#64555B

#5B6455

Split Complementary

#555B64

#645755

#636455

Tetradic

#555B64

#645563

#645E55

#556457

Color Blindness Simulation

Original

#555B64

Protanopia

#585862

Deuteranopia

#575761

Tritanopia

#556060

Achromatopsia

#5A5A5A

CSS Usage

background-color: #555B64;
color: #555B64;
border-color: #555B64;
Nearest Tailwind: Zinc 600 #52525B

Tailwind Shades

50
#F7F7F8
100
#ECEDEE
200
#D8DBDE
300
#BDC1C7
400
#999FA8
500
#757D8A
600
#5E646E
700
#4B5058
800
#3B3F45
900
#2D3034
950
#1C1E21

Contrast Checker

Text on white

6.85:1

AA Pass AAA Fail

Text on black

3.07:1

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