#40378D

#40378D

Color Values

HEX

#40378D

RGB

64, 55, 141

HSL

246.3, 43.9%, 38.4%

HSV

246.3, 61.0%, 55.3%

CMYK

54.6%, 61.0%, 0.0%, 44.7%

OKLCH

0.3977 0.1373 282.9

Properties

Cool Dark Nearest: slateblue 4

Color Harmonies

Complementary

#40378D

#848D37

Analogous

#37598D

#6B378D

#40378D

Triadic

#40378D

#8D4037

#378D40

Split Complementary

#40378D

#8D6B37

#598D37

Tetradic

#40378D

#8D3759

#848D37

#378D6B

Color Blindness Simulation

Original

#40378D

Protanopia

#3C3C78

Deuteranopia

#3D3D73

Tritanopia

#406864

Achromatopsia

#3F3F3F

CSS Usage

background-color: #40378D;
color: #40378D;
border-color: #40378D;
Nearest Tailwind: Indigo 900 #312E81

Tailwind Shades

50
#F5F4FA
100
#E8E6F4
200
#CFCCEB
300
#ADA7DD
400
#8077CA
500
#5348B7
600
#433993
700
#352E75
800
#2A245C
900
#211D44
950
#15132B

Contrast Checker

Text on white

9.77:1

AA Pass AAA Pass

Text on black

2.15:1

AA Fail AAA Fail

Related Articles

Tutorials

Responsive Color: Adapting Colors for Different Screens

Jan 23, 2026
Tutorials

Color for Data Storytelling: Beyond Default Chart Colors

Jan 21, 2026
Tutorials

How to Choose Brand Colors: A Step-by-Step Guide

Jan 18, 2026