#040019

#040019

Color Values

HEX

#040019

RGB

4, 0, 25

HSL

249.6, 100.0%, 4.9%

HSV

249.6, 100.0%, 9.8%

CMYK

84.0%, 100.0%, 0.0%, 90.2%

OKLCH

0.1069 0.0627 284.4

Properties

Cool Dark Nearest: RAL 5003 Sapphire Blue

Color Harmonies

Complementary

#040019

#151900

Analogous

#000819

#100019

#040019

Triadic

#040019

#190400

#001904

Split Complementary

#040019

#191000

#081900

Tetradic

#040019

#190008

#151900

#001910

Color Blindness Simulation

Original

#040019

Protanopia

#020213

Deuteranopia

#020312

Tritanopia

#040E0D

Achromatopsia

#030303

CSS Usage

background-color: #040019;
color: #040019;
border-color: #040019;
Nearest Tailwind: Slate 950 #020617

Tailwind Shades

50
#F3F1FE
100
#E3DEFC
200
#C3B8FF
300
#9885FF
400
#6042FF
500
#2900FF
600
#2100CC
700
#1A00A3
800
#140080
900
#13055C
950
#0C033A

Contrast Checker

Text on white

20.6:1

AA Pass AAA Pass

Text on black

1.02:1

AA Fail AAA Fail

Related Articles

Tutorials

Responsive Color: Adapting Colors for Different Screens

Jan 23, 2026
Tutorials

Color for Data Storytelling: Beyond Default Chart Colors

Jan 21, 2026
Tutorials

How to Choose Brand Colors: A Step-by-Step Guide

Jan 18, 2026