#04121B

#04121B

Color Values

HEX

#04121B

RGB

4, 18, 27

HSL

203.5, 74.2%, 6.1%

HSV

203.5, 85.2%, 10.6%

CMYK

85.2%, 33.3%, 0.0%, 89.4%

OKLCH

0.1739 0.0282 236.8

Properties

Cool Dark Nearest: RAL 5004 Black Blue

Color Harmonies

Complementary

#04121B

#1B0D04

Analogous

#041B19

#04071B

#04121B

Triadic

#04121B

#1B0412

#121B04

Split Complementary

#04121B

#1B0407

#1B1904

Tetradic

#04121B

#19041B

#1B0D04

#071B04

Color Blindness Simulation

Original

#04121B

Protanopia

#0A0A19

Deuteranopia

#090818

Tritanopia

#051717

Achromatopsia

#101010

CSS Usage

background-color: #04121B;
color: #04121B;
border-color: #04121B;
Nearest Tailwind: Gray 950 #030712

Tailwind Shades

50
#F3F8FC
100
#E2F0F8
200
#C1E1F6
300
#94CCEF
400
#5BB0E7
500
#2194DE
600
#1A76B2
700
#155F8E
800
#104A6F
900
#103751
950
#0A2333

Contrast Checker

Text on white

18.96:1

AA Pass AAA Pass

Text on black

1.11:1

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