#645C79

#645C79

Color Values

HEX

#645C79

RGB

100, 92, 121

HSL

256.6, 13.6%, 41.8%

HSV

256.6, 24.0%, 47.5%

CMYK

17.4%, 24.0%, 0.0%, 52.5%

OKLCH

0.4934 0.0466 297.3

Properties

Cool Dark Nearest: RAL 5014 Pigeon Blue

Color Harmonies

Complementary

#645C79

#71795C

Analogous

#5C6379

#735C79

#645C79

Triadic

#645C79

#79645C

#5C7964

Split Complementary

#645C79

#79735C

#63795C

Tetradic

#645C79

#795C63

#71795C

#5C7973

Color Blindness Simulation

Original

#645C79

Protanopia

#616072

Deuteranopia

#616270

Tritanopia

#646C6B

Achromatopsia

#606060

CSS Usage

background-color: #645C79;
color: #645C79;
border-color: #645C79;
Nearest Tailwind: Slate 600 #475569

Tailwind Shades

50
#F7F6F8
100
#ECEBEF
200
#D9D6E0
300
#BEB9CA
400
#9B94AD
500
#786E91
600
#605874
700
#4D475D
800
#3C3748
900
#2E2B36
950
#1D1B22

Contrast Checker

Text on white

6.27:1

AA Pass AAA Fail

Text on black

3.35:1

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