#04181B

#04181B

Color Values

HEX

#04181B

RGB

4, 24, 27

HSL

187.8, 74.2%, 6.1%

HSV

187.8, 85.2%, 10.6%

CMYK

85.2%, 11.1%, 0.0%, 89.4%

OKLCH

0.1937 0.0274 208.0

Properties

Cool Dark Nearest: RAL 5004 Black Blue

Color Harmonies

Complementary

#04181B

#1B0704

Analogous

#041B13

#040D1B

#04181B

Triadic

#04181B

#1B0418

#181B04

Split Complementary

#04181B

#1B040D

#1B1304

Tetradic

#04181B

#13041B

#1B0704

#0D1B04

Color Blindness Simulation

Original

#04181B

Protanopia

#0D0D1A

Deuteranopia

#0C0A1A

Tritanopia

#051A1A

Achromatopsia

#141414

CSS Usage

background-color: #04181B;
color: #04181B;
border-color: #04181B;
Nearest Tailwind: Zinc 900 #18181B

Tailwind Shades

50
#F3FBFC
100
#E2F5F8
200
#C1EFF6
300
#94E3EF
400
#5BD4E7
500
#21C6DE
600
#1A9EB2
700
#157E8E
800
#10636F
900
#104851
950
#0A2E33

Contrast Checker

Text on white

18.23:1

AA Pass AAA Pass

Text on black

1.15:1

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