#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

Brand Stories

Pantone Colors by Decade: The 2000s, 2010s, and 2020s Compared

Feb 01, 2026
Tutorials

Responsive Color: Adapting Colors for Different Screens

Jan 23, 2026
Tutorials

Color for Data Storytelling: Beyond Default Chart Colors

Jan 21, 2026