#4240CF

#4240CF

Color Values

HEX

#4240CF

RGB

66, 64, 207

HSL

240.8, 59.8%, 53.1%

HSV

240.8, 69.1%, 81.2%

CMYK

68.1%, 69.1%, 0.0%, 18.8%

OKLCH

0.4726 0.2126 275.2

Properties

Cool Dark Nearest: Purple Heart

Color Harmonies

Complementary

#4240CF

#CDCF40

Analogous

#4085CF

#8940CF

#4240CF

Triadic

#4240CF

#CF4240

#40CF42

Split Complementary

#4240CF

#CF8940

#85CF40

Tetradic

#4240CF

#CF4085

#CDCF40

#40CF89

Color Blindness Simulation

Original

#4240CF

Protanopia

#4141AC

Deuteranopia

#4141A4

Tritanopia

#42918B

Achromatopsia

#4B4B4B

CSS Usage

background-color: #4240CF;
color: #4240CF;
border-color: #4240CF;
Nearest Tailwind: Indigo 700 #4338CA

Tailwind Shades

50
#F4F3FB
100
#E4E4F6
200
#C7C6F1
300
#9E9DE6
400
#6A68D9
500
#3533CC
600
#2B29A3
700
#222182
800
#1B1A66
900
#17164B
950
#0F0E2F

Contrast Checker

Text on white

7.33:1

AA Pass AAA Pass

Text on black

2.87:1

AA Fail AAA Fail

Related Articles

Tutorials

Building a Color Picker Web Component from Scratch

2月 20, 2026
Tutorials

Web Color Performance: Gradients, Shadows, and Filters

2月 19, 2026
Tutorials

Tailwind CSS Colors: Complete Shade System Guide

2月 19, 2026