#03051B

#03051B

Color Values

HEX

#03051B

RGB

3, 5, 27

HSL

235.0, 80.0%, 5.9%

HSV

235.0, 88.9%, 10.6%

CMYK

88.9%, 81.5%, 0.0%, 89.4%

OKLCH

0.1309 0.0497 271.2

Properties

Cool Dark Nearest: RAL 5003 Sapphire Blue

Color Harmonies

Complementary

#03051B

#1B1903

Analogous

#03111B

#0D031B

#03051B

Triadic

#03051B

#1B0305

#051B03

Split Complementary

#03051B

#1B0D03

#111B03

Tetradic

#03051B

#1B0311

#1B1903

#031B0D

Color Blindness Simulation

Original

#03051B

Protanopia

#040416

Deuteranopia

#040414

Tritanopia

#031111

Achromatopsia

#060606

CSS Usage

background-color: #03051B;
color: #03051B;
border-color: #03051B;
Nearest Tailwind: Slate 950 #020617

Tailwind Shades

50
#F2F3FD
100
#E1E3F9
200
#BFC4F8
300
#9199F3
400
#5562EC
500
#192BE6
600
#1422B8
700
#101B93
800
#0D1573
900
#0E1353
950
#090C35

Contrast Checker

Text on white

20.17:1

AA Pass AAA Pass

Text on black

1.04:1

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