#040819

#040819

Color Values

HEX

#040819

RGB

4, 8, 25

HSL

228.6, 72.4%, 5.7%

HSV

228.6, 84.0%, 9.8%

CMYK

84.0%, 68.0%, 0.0%, 90.2%

OKLCH

0.1409 0.0384 267.9

Properties

Cool Dark Nearest: RAL 5004 Black Blue

Color Harmonies

Complementary

#040819

#191504

Analogous

#041319

#0B0419

#040819

Triadic

#040819

#190408

#081904

Split Complementary

#040819

#190B04

#131904

Tetradic

#040819

#190413

#191504

#04190B

Color Blindness Simulation

Original

#040819

Protanopia

#060615

Deuteranopia

#060514

Tritanopia

#041211

Achromatopsia

#080808

CSS Usage

background-color: #040819;
color: #040819;
border-color: #040819;
Nearest Tailwind: Slate 950 #020617

Tailwind Shades

50
#F3F4FC
100
#E2E6F8
200
#C1CBF5
300
#95A6EE
400
#5C76E5
500
#2346DC
600
#1C38B0
700
#172D8D
800
#12236E
900
#111D50
950
#0B1233

Contrast Checker

Text on white

19.93:1

AA Pass AAA Pass

Text on black

1.05:1

AA Fail AAA Fail

Related Articles

Tutorials

CSS color-mix(): Blend Colors Natively in the Browser

Jan 26, 2026
Tutorials

Building a Color Picker Web Component from Scratch

Jan 21, 2026
Tutorials

Perceptual Color Spaces: Lab, LCH, Oklab, OKLCH

Jan 15, 2026