#645554

#645554

Color Values

HEX

#645554

RGB

100, 85, 84

HSL

3.7, 8.7%, 36.1%

HSV

3.7, 16.0%, 39.2%

CMYK

0.0%, 15.0%, 16.0%, 60.8%

OKLCH

0.464 0.0199 22.4

Properties

Warm Dark Nearest: NCS S 7000-N Dark Grey

Color Harmonies

Complementary

#645554

#546364

Analogous

#64545B

#645D54

#645554

Triadic

#645554

#546455

#555464

Split Complementary

#645554

#54645D

#545B64

Tetradic

#645554

#5B6454

#546364

#5D5464

Color Blindness Simulation

Original

#645554

Protanopia

#5E5D54

Deuteranopia

#5E6054

Tritanopia

#635454

Achromatopsia

#585858

CSS Usage

background-color: #645554;
color: #645554;
border-color: #645554;
Nearest Tailwind: Stone 600 #57534E

Tailwind Shades

50
#F8F7F7
100
#EEECEC
200
#DED9D8
300
#C7BDBC
400
#A99998
500
#8B7674
600
#6F5E5D
700
#594B4B
800
#453B3A
900
#342D2D
950
#211C1C

Contrast Checker

Text on white

7.07:1

AA Pass AAA Pass

Text on black

2.97:1

AA Fail AAA Fail

Related Articles

Tutorials

Building a Color Picker Web Component from Scratch

Feb 20, 2026
Tutorials

Web Color Performance: Gradients, Shadows, and Filters

Feb 19, 2026
Tutorials

Tailwind CSS Colors: Complete Shade System Guide

Feb 19, 2026