#3731A5

#3731A5

Color Values

HEX

#3731A5

RGB

55, 49, 165

HSL

243.1, 54.2%, 42.0%

HSV

243.1, 70.3%, 64.7%

CMYK

66.7%, 70.3%, 0.0%, 35.3%

OKLCH

0.4019 0.1788 277.0

Properties

Cool Dark Nearest: NCS S 2050-R70B Violet

Color Harmonies

Complementary

#3731A5

#9FA531

Analogous

#3165A5

#7131A5

#3731A5

Triadic

#3731A5

#A53731

#31A537

Split Complementary

#3731A5

#A57131

#65A531

Tetradic

#3731A5

#A53165

#9FA531

#31A571

Color Blindness Simulation

Original

#3731A5

Protanopia

#343489

Deuteranopia

#353582

Tritanopia

#37736E

Achromatopsia

#3B3B3B

CSS Usage

background-color: #3731A5;
color: #3731A5;
border-color: #3731A5;
Nearest Tailwind: Indigo 800 #3730A3

Tailwind Shades

50
#F4F4FB
100
#E6E5F5
200
#CAC8EF
300
#A4A1E3
400
#736ED4
500
#423AC5
600
#342F9D
700
#2A257E
800
#211D62
900
#1B1948
950
#11102E

Contrast Checker

Text on white

9.79:1

AA Pass AAA Pass

Text on black

2.15:1

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