#040D29

#040D29

Color Values

HEX

#040D29

RGB

4, 13, 41

HSL

225.4, 82.2%, 8.8%

HSV

225.4, 90.2%, 16.1%

CMYK

90.2%, 68.3%, 0.0%, 83.9%

OKLCH

0.1709 0.0594 265.0

Properties

Cool Dark Nearest: RAL 5003 Sapphire Blue

Color Harmonies

Complementary

#040D29

#292004

Analogous

#041F29

#0D0429

#040D29

Triadic

#040D29

#29040D

#0D2904

Split Complementary

#040D29

#290D04

#1F2904

Tetradic

#040D29

#29041F

#292004

#04290D

Color Blindness Simulation

Original

#040D29

Protanopia

#080822

Deuteranopia

#070721

Tritanopia

#041D1C

Achromatopsia

#0D0D0D

CSS Usage

background-color: #040D29;
color: #040D29;
border-color: #040D29;
Nearest Tailwind: Slate 900 #0F172A

Tailwind Shades

50
#F2F5FD
100
#E1E7FA
200
#BECCF9
300
#8FA8F4
400
#5379EE
500
#174AE8
600
#123BBA
700
#0F2F95
800
#0B2574
900
#0D1E54
950
#081335

Contrast Checker

Text on white

19.18:1

AA Pass AAA Pass

Text on black

1.09:1

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