#040221

#040221

Color Values

HEX

#040221

RGB

4, 2, 33

HSL

243.9, 88.6%, 6.9%

HSV

243.9, 93.9%, 12.9%

CMYK

87.9%, 93.9%, 0.0%, 87.1%

OKLCH

0.1286 0.0674 276.5

Properties

Cool Dark Nearest: RAL 5003 Sapphire Blue

Color Harmonies

Complementary

#040221

#1F2102

Analogous

#021021

#140221

#040221

Triadic

#040221

#210402

#022104

Split Complementary

#040221

#211402

#102102

Tetradic

#040221

#210210

#1F2102

#022114

Color Blindness Simulation

Original

#040221

Protanopia

#03031A

Deuteranopia

#030318

Tritanopia

#041412

Achromatopsia

#050505

CSS Usage

background-color: #040221;
color: #040221;
border-color: #040221;
Nearest Tailwind: Slate 900 #0F172A

Tailwind Shades

50
#F2F2FD
100
#E1E0FB
200
#C0BCFB
300
#938CF8
400
#584DF4
500
#1D0FF0
600
#170CC0
700
#13099A
800
#0F0778
900
#0F0A57
950
#090637

Contrast Checker

Text on white

20.27:1

AA Pass AAA Pass

Text on black

1.04:1

AA Fail AAA Fail

Related Articles

Tutorials

Responsive Color: Adapting Colors for Different Screens

Jan 23, 2026
Tutorials

Color for Data Storytelling: Beyond Default Chart Colors

Jan 21, 2026
Tutorials

How to Choose Brand Colors: A Step-by-Step Guide

Jan 18, 2026