#643D66

#643D66

Color Values

HEX

#643D66

RGB

100, 61, 102

HSL

297.1, 25.2%, 32.0%

HSV

297.1, 40.2%, 40.0%

CMYK

2.0%, 40.2%, 0.0%, 60.0%

OKLCH

0.4221 0.0817 325.2

Properties

Cool Dark Nearest: RAL 4005 Blue Lilac

Color Harmonies

Complementary

#643D66

#3F663D

Analogous

#503D66

#663D54

#643D66

Triadic

#643D66

#66643D

#3D6664

Split Complementary

#643D66

#54663D

#3D6650

Tetradic

#643D66

#66503D

#3F663D

#3D5466

Color Blindness Simulation

Original

#643D66

Protanopia

#53535C

Deuteranopia

#55585A

Tritanopia

#625453

Achromatopsia

#484848

CSS Usage

background-color: #643D66;
color: #643D66;
border-color: #643D66;
Nearest Tailwind: Indigo 950 #1E1B4B

Tailwind Shades

50
#F9F6F9
100
#F1E9F1
200
#E3D2E4
300
#D0B2D1
400
#B689B8
500
#9D5FA0
600
#7D4C80
700
#643D66
800
#4E3050
900
#3A253B
950
#251826

Contrast Checker

Text on white

8.75:1

AA Pass AAA Pass

Text on black

2.4:1

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