#051228

#051228

Color Values

HEX

#051228

RGB

5, 18, 40

HSL

217.7, 77.8%, 8.8%

HSV

217.7, 87.5%, 15.7%

CMYK

87.5%, 55.0%, 0.0%, 84.3%

OKLCH

0.1846 0.0491 259.1

Properties

Cool Dark Nearest: RAL 5003 Sapphire Blue

Color Harmonies

Complementary

#051228

#281B05

Analogous

#052328

#090528

#051228

Triadic

#051228

#280512

#122805

Split Complementary

#051228

#280905

#232805

Tetradic

#051228

#280523

#281B05

#052809

Color Blindness Simulation

Original

#051228

Protanopia

#0B0B23

Deuteranopia

#0A0921

Tritanopia

#061E1E

Achromatopsia

#111111

CSS Usage

background-color: #051228;
color: #051228;
border-color: #051228;
Nearest Tailwind: Slate 900 #0F172A

Tailwind Shades

50
#F2F6FC
100
#E1EAF9
200
#C0D4F7
300
#92B6F1
400
#578EEA
500
#1C66E3
600
#1752B5
700
#124191
800
#0E3371
900
#0F2852
950
#091934

Contrast Checker

Text on white

18.69:1

AA Pass AAA Pass

Text on black

1.12:1

AA Fail AAA Fail

Related Articles

Tutorials

Responsive Color: Adapting Colors for Different Screens

Jan 23, 2026
Tutorials

Color for Data Storytelling: Beyond Default Chart Colors

Jan 21, 2026
Tutorials

How to Choose Brand Colors: A Step-by-Step Guide

Jan 18, 2026