#3F3F8C

#3F3F8C

Color Values

HEX

#3F3F8C

RGB

63, 63, 140

HSL

240.0, 37.9%, 39.8%

HSV

240.0, 55.0%, 54.9%

CMYK

55.0%, 55.0%, 0.0%, 45.1%

OKLCH

0.4113 0.1247 279.4

Properties

Cool Dark Nearest: darkslateblue

Color Harmonies

Complementary

#3F3F8C

#8C8C3F

Analogous

#3F658C

#653F8C

#3F3F8C

Triadic

#3F3F8C

#8C3F3F

#3F8C3F

Split Complementary

#3F3F8C

#8C653F

#658C3F

Tetradic

#3F3F8C

#8C3F65

#8C8C3F

#3F8C65

Color Blindness Simulation

Original

#3F3F8C

Protanopia

#3F3F79

Deuteranopia

#3F3F75

Tritanopia

#3F6B67

Achromatopsia

#454545

CSS Usage

background-color: #3F3F8C;
color: #3F3F8C;
border-color: #3F3F8C;
Nearest Tailwind: Blue 900 #1E3A8A

Tailwind Shades

50
#F5F5FA
100
#E7E7F3
200
#CECEE9
300
#ABABD9
400
#7D7DC4
500
#4F4FB0
600
#3F3F8D
700
#333371
800
#282858
900
#202041
950
#141429

Contrast Checker

Text on white

9.13:1

AA Pass AAA Pass

Text on black

2.3:1

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