#040517

#040517

Color Values

HEX

#040517

RGB

4, 5, 23

HSL

236.8, 70.4%, 5.3%

HSV

236.8, 82.6%, 9.0%

CMYK

82.6%, 78.3%, 0.0%, 91.0%

OKLCH

0.128 0.0415 275.3

Properties

Cool Dark Nearest: RAL 5004 Black Blue

Color Harmonies

Complementary

#040517

#171604

Analogous

#040F17

#0D0417

#040517

Triadic

#040517

#170405

#051704

Split Complementary

#040517

#170D04

#0F1704

Tetradic

#040517

#17040F

#171604

#04170D

Color Blindness Simulation

Original

#040517

Protanopia

#040413

Deuteranopia

#040412

Tritanopia

#040F0E

Achromatopsia

#060606

CSS Usage

background-color: #040517;
color: #040517;
border-color: #040517;
Nearest Tailwind: Slate 950 #020617

Tailwind Shades

50
#F3F3FC
100
#E2E4F8
200
#C2C5F4
300
#979BED
400
#5E65E3
500
#262FD9
600
#1E26AE
700
#181E8B
800
#13186D
900
#12154F
950
#0B0D32

Contrast Checker

Text on white

20.21:1

AA Pass AAA Pass

Text on black

1.04:1

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