#040323

#040323

Color Values

HEX

#040323

RGB

4, 3, 35

HSL

241.9, 84.2%, 7.5%

HSV

241.9, 91.4%, 13.7%

CMYK

88.6%, 91.4%, 0.0%, 86.3%

OKLCH

0.1352 0.0679 274.7

Properties

Cool Dark Nearest: RAL 5003 Sapphire Blue

Color Harmonies

Complementary

#040323

#222303

Analogous

#031223

#140323

#040323

Triadic

#040323

#230403

#032304

Split Complementary

#040323

#231403

#122303

Tetradic

#040323

#230312

#222303

#032314

Color Blindness Simulation

Original

#040323

Protanopia

#04041B

Deuteranopia

#040419

Tritanopia

#041514

Achromatopsia

#060606

CSS Usage

background-color: #040323;
color: #040323;
border-color: #040323;
Nearest Tailwind: Slate 900 #0F172A

Tailwind Shades

50
#F2F2FD
100
#E1E0FA
200
#BFBDF9
300
#928EF5
400
#5651F0
500
#1B14EB
600
#1610BC
700
#110D96
800
#0D0A75
900
#0E0C55
950
#090736

Contrast Checker

Text on white

20.14:1

AA Pass AAA Pass

Text on black

1.04:1

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