#040429

#040429

Color Values

HEX

#040429

RGB

4, 4, 41

HSL

240.0, 82.2%, 8.8%

HSV

240.0, 90.2%, 16.1%

CMYK

90.2%, 90.2%, 0.0%, 83.9%

OKLCH

0.1469 0.075 272.3

Properties

Cool Dark Nearest: RAL 5013 Cobalt Blue

Color Harmonies

Complementary

#040429

#292904

Analogous

#041629

#160429

#040429

Triadic

#040429

#290404

#042904

Split Complementary

#040429

#291604

#162904

Tetradic

#040429

#290416

#292904

#042916

Color Blindness Simulation

Original

#040429

Protanopia

#040420

Deuteranopia

#04041E

Tritanopia

#041917

Achromatopsia

#070707

CSS Usage

background-color: #040429;
color: #040429;
border-color: #040429;
Nearest Tailwind: Slate 900 #0F172A

Tailwind Shades

50
#F2F2FD
100
#E1E1FA
200
#BEBEF9
300
#8F8FF4
400
#5353EE
500
#1717E8
600
#1212BA
700
#0F0F95
800
#0B0B74
900
#0D0D54
950
#080835

Contrast Checker

Text on white

19.91:1

AA Pass AAA Pass

Text on black

1.05:1

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