#3F40CB

#3F40CB

Color Values

HEX

#3F40CB

RGB

63, 64, 203

HSL

239.6, 57.4%, 52.2%

HSV

239.6, 69.0%, 79.6%

CMYK

69.0%, 68.5%, 0.0%, 20.4%

OKLCH

0.467 0.2083 274.5

Properties

Cool Dark Nearest: Purple Heart

Color Harmonies

Complementary

#3F40CB

#CBCA3F

Analogous

#3F86CB

#843FCB

#3F40CB

Triadic

#3F40CB

#CB3F40

#40CB3F

Split Complementary

#3F40CB

#CB843F

#86CB3F

Tetradic

#3F40CB

#CB3F86

#CBCA3F

#3FCB84

Color Blindness Simulation

Original

#3F40CB

Protanopia

#3F3FA9

Deuteranopia

#3F3FA1

Tritanopia

#3F8F89

Achromatopsia

#4A4A4A

CSS Usage

background-color: #3F40CB;
color: #3F40CB;
border-color: #3F40CB;
Nearest Tailwind: Indigo 700 #4338CA

Tailwind Shades

50
#F4F4FB
100
#E4E5F6
200
#C7C7F0
300
#9F9FE5
400
#6A6BD7
500
#3637C9
600
#2B2CA1
700
#232380
800
#1B1C64
900
#171849
950
#0F0F2E

Contrast Checker

Text on white

7.48:1

AA Pass AAA Pass

Text on black

2.81:1

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