#646C75

#646C75

Color Values

HEX

#646C75

RGB

100, 108, 117

HSL

211.8, 7.8%, 42.5%

HSV

211.8, 14.5%, 45.9%

CMYK

14.5%, 7.7%, 0.0%, 54.1%

OKLCH

0.5276 0.0172 251.3

Properties

Cool Dark Nearest: RAL 4012 Pearl Blackberry

Color Harmonies

Complementary

#646C75

#756D64

Analogous

#647475

#646475

#646C75

Triadic

#646C75

#75646C

#6C7564

Split Complementary

#646C75

#756464

#747564

Tetradic

#646C75

#756474

#756D64

#647564

Color Blindness Simulation

Original

#646C75

Protanopia

#676873

Deuteranopia

#676672

Tritanopia

#647171

Achromatopsia

#6B6B6B

CSS Usage

background-color: #646C75;
color: #646C75;
border-color: #646C75;
Nearest Tailwind: Gray 500 #6B7280

Tailwind Shades

50
#F7F7F8
100
#ECEDEE
200
#D9DBDE
300
#BDC2C7
400
#99A0A8
500
#767F89
600
#5E666E
700
#4B5158
800
#3B3F45
900
#2D3034
950
#1C1E21

Contrast Checker

Text on white

5.32:1

AA Pass AAA Fail

Text on black

3.94:1

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