#3731DA

#3731DA

Color Values

HEX

#3731DA

RGB

55, 49, 218

HSL

242.1, 69.5%, 52.4%

HSV

242.1, 77.5%, 85.5%

CMYK

74.8%, 77.5%, 0.0%, 14.5%

OKLCH

0.4565 0.2426 272.7

Properties

Cool Dark Nearest: mediumblue

Color Harmonies

Complementary

#3731DA

#D4DA31

Analogous

#3180DA

#8C31DA

#3731DA

Triadic

#3731DA

#DA3731

#31DA37

Split Complementary

#3731DA

#DA8C31

#80DA31

Tetradic

#3731DA

#DA3180

#D4DA31

#31DA8C

Color Blindness Simulation

Original

#3731DA

Protanopia

#3434B1

Deuteranopia

#3535A7

Tritanopia

#37918A

Achromatopsia

#3E3E3E

CSS Usage

background-color: #3731DA;
color: #3731DA;
border-color: #3731DA;
Nearest Tailwind: Indigo 600 #4F46E5

Tailwind Shades

50
#F3F3FC
100
#E3E3F8
200
#C4C2F4
300
#9A97EC
400
#645FE2
500
#2D27D8
600
#241FAD
700
#1D198A
800
#17136C
900
#14124F
950
#0D0B32

Contrast Checker

Text on white

8.03:1

AA Pass AAA Pass

Text on black

2.61:1

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