#040D2F

#040D2F

Color Values

HEX

#040D2F

RGB

4, 13, 47

HSL

227,4, 84,3%, 10,0%

HSV

227,4, 91,5%, 18,4%

CMYK

91,5%, 72,3%, 0,0%, 81,6%

OKLCH

0,1773 0,0697 266,0

Properties

Cool Dark Nearest: RAL 5013 Cobalt Blue

Color Harmonies

Complementary

#040D2F

#2F2604

Analogous

#04232F

#10042F

#040D2F

Triadic

#040D2F

#2F040D

#0D2F04

Split Complementary

#040D2F

#2F1004

#232F04

Tetradic

#040D2F

#2F0423

#2F2604

#042F10

Color Blindness Simulation

Original

#040D2F

Protanopia

#080827

Deuteranopia

#070725

Tritanopia

#04201F

Achromatopsia

#0E0E0E

CSS Usage

background-color: #040D2F;
color: #040D2F;
border-color: #040D2F;
Nearest Tailwind: Slate 900 #0F172A

Tailwind Shades

50
#F2F4FD
100
#E0E6FA
200
#BDCAF9
300
#8EA4F5
400
#5173F0
500
#1441EB
600
#1034BC
700
#0D2A96
800
#0A2175
900
#0C1B55
950
#071136

Contrast Checker

Text on white

19,03:1

AA Pass AAA Pass

Text on black

1,1:1

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