#645C70

#645C70

Color Values

HEX

#645C70

RGB

100, 92, 112

HSL

264.0, 9.8%, 40.0%

HSV

264.0, 17.9%, 43.9%

CMYK

10.7%, 17.9%, 0.0%, 56.1%

OKLCH

0.4896 0.0329 303.4

Properties

Cool Dark Nearest: RAL 4012 Pearl Blackberry

Color Harmonies

Complementary

#645C70

#68705C

Analogous

#5C5E70

#6E5C70

#645C70

Triadic

#645C70

#70645C

#5C7064

Split Complementary

#645C70

#706E5C

#5E705C

Tetradic

#645C70

#705C5E

#68705C

#5C706E

Color Blindness Simulation

Original

#645C70

Protanopia

#61606B

Deuteranopia

#61626A

Tritanopia

#646766

Achromatopsia

#5F5F5F

CSS Usage

background-color: #645C70;
color: #645C70;
border-color: #645C70;
Nearest Tailwind: Zinc 600 #52525B

Tailwind Shades

50
#F7F7F8
100
#EDECEF
200
#DBD8DF
300
#C1BCC8
400
#9F97AA
500
#7D738C
600
#645C70
700
#504A5A
800
#3F3A46
900
#302C35
950
#1E1C21

Contrast Checker

Text on white

6.35:1

AA Pass AAA Fail

Text on black

3.31:1

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