#645F79

#645F79

Color Values

HEX

#645F79

RGB

100, 95, 121

HSL

251.5, 12.0%, 42.4%

HSV

251.5, 21.5%, 47.5%

CMYK

17.4%, 21.5%, 0.0%, 52.5%

OKLCH

0.4999 0.0413 293.7

Properties

Cool Dark Nearest: RAL 5014 Pigeon Blue

Color Harmonies

Complementary

#645F79

#74795F

Analogous

#5F6779

#715F79

#645F79

Triadic

#645F79

#79645F

#5F7964

Split Complementary

#645F79

#79715F

#67795F

Tetradic

#645F79

#795F67

#74795F

#5F7971

Color Blindness Simulation

Original

#645F79

Protanopia

#626273

Deuteranopia

#626271

Tritanopia

#646E6D

Achromatopsia

#626262

CSS Usage

background-color: #645F79;
color: #645F79;
border-color: #645F79;
Nearest Tailwind: Slate 600 #475569

Tailwind Shades

50
#F7F7F8
100
#ECEBEF
200
#D9D7E0
300
#BDBAC9
400
#9A95AC
500
#76708F
600
#5E5A72
700
#4C485B
800
#3B3847
900
#2D2B36
950
#1D1B22

Contrast Checker

Text on white

6.08:1

AA Pass AAA Fail

Text on black

3.45:1

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