#042139

#042139

Color Values

HEX

#042139

RGB

4, 33, 57

HSL

207.2, 86.9%, 12.0%

HSV

207.2, 93.0%, 22.4%

CMYK

93.0%, 42.1%, 0.0%, 77.6%

OKLCH

0.2409 0.0574 247.4

Properties

Cool Dark Nearest: RAL 5003 Sapphire Blue

Color Harmonies

Complementary

#042139

#391C04

Analogous

#043937

#040639

#042139

Triadic

#042139

#390421

#213904

Split Complementary

#042139

#390406

#393704

Tetradic

#042139

#370439

#391C04

#063904

Color Blindness Simulation

Original

#042139

Protanopia

#111133

Deuteranopia

#0F0D32

Tritanopia

#052F2E

Achromatopsia

#1D1D1D

CSS Usage

background-color: #042139;
color: #042139;
border-color: #042139;
Nearest Tailwind: Sky 950 #082F49

Tailwind Shades

50
#F2F8FD
100
#E0EEFA
200
#BCDEFA
300
#8DC7F7
400
#4FA8F3
500
#118AEE
600
#0D6EBF
700
#0B5899
800
#084577
900
#0B3456
950
#072137

Contrast Checker

Text on white

16.38:1

AA Pass AAA Pass

Text on black

1.28:1

AA Fail AAA Fail

Related Articles

Tutorials

Building a Color Picker Web Component from Scratch

Feb 20, 2026
Tutorials

Web Color Performance: Gradients, Shadows, and Filters

Feb 19, 2026
Tutorials

Tailwind CSS Colors: Complete Shade System Guide

Feb 19, 2026