#643D91

#643D91

Color Values

HEX

#643D91

RGB

100, 61, 145

HSL

267.9, 40.8%, 40.4%

HSV

267.9, 57.9%, 56.9%

CMYK

31.0%, 57.9%, 0.0%, 43.1%

OKLCH

0.4472 0.1351 302.7

Properties

Cool Dark Nearest: Royal Purple

Color Harmonies

Complementary

#643D91

#6A913D

Analogous

#3D4091

#8E3D91

#643D91

Triadic

#643D91

#91643D

#3D9164

Split Complementary

#643D91

#918E3D

#40913D

Tetradic

#643D91

#913D40

#6A913D

#3D918E

Color Blindness Simulation

Original

#643D91

Protanopia

#53537D

Deuteranopia

#555878

Tritanopia

#626D69

Achromatopsia

#4B4B4B

CSS Usage

background-color: #643D91;
color: #643D91;
border-color: #643D91;
Nearest Tailwind: Indigo 900 #312E81

Tailwind Shades

50
#F7F5FA
100
#EDE7F3
200
#DACDEA
300
#C0A9DB
400
#9E7AC7
500
#7C4BB4
600
#633C90
700
#4F3073
800
#3E265A
900
#2F1F42
950
#1E132A

Contrast Checker

Text on white

8.02:1

AA Pass AAA Pass

Text on black

2.62:1

AA Fail AAA Fail

Related Articles

Tutorials

CSS color-mix(): Blend Colors Natively in the Browser

Jan 26, 2026
Tutorials

Building a Color Picker Web Component from Scratch

Jan 21, 2026
Tutorials

Perceptual Color Spaces: Lab, LCH, Oklab, OKLCH

Jan 15, 2026