#646D89

#646D89

Color Values

HEX

#646D89

RGB

100, 109, 137

HSL

225.4, 15.6%, 46.5%

HSV

225.4, 27.0%, 53.7%

CMYK

27.0%, 20.4%, 0.0%, 46.3%

OKLCH

0.5378 0.0453 270.9

Properties

Cool Dark Nearest: RAL 5014 Pigeon Blue

Color Harmonies

Complementary

#646D89

#898064

Analogous

#648089

#6E6489

#646D89

Triadic

#646D89

#89646D

#6D8964

Split Complementary

#646D89

#896E64

#808964

Tetradic

#646D89

#896480

#898064

#64896E

Color Blindness Simulation

Original

#646D89

Protanopia

#686882

Deuteranopia

#676781

Tritanopia

#647D7C

Achromatopsia

#6D6D6D

CSS Usage

background-color: #646D89;
color: #646D89;
border-color: #646D89;
Nearest Tailwind: Slate 500 #64748B

Tailwind Shades

50
#F6F7F8
100
#EBECF0
200
#D6D8E1
300
#B8BDCB
400
#9299AF
500
#6C7593
600
#565E76
700
#454B5E
800
#363B4A
900
#2A2D37
950
#1A1C23

Contrast Checker

Text on white

5.13:1

AA Pass AAA Fail

Text on black

4.09:1

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