#181D33

#181D33

Color Values

HEX

#181D33

RGB

24, 29, 51

HSL

228.9, 36.0%, 14.7%

HSV

228.9, 52.9%, 20.0%

CMYK

52.9%, 43.1%, 0.0%, 80.0%

OKLCH

0.2377 0.043 273.0

Properties

Cool Dark Nearest: RAL 5003 Sapphire Blue

Color Harmonies

Complementary

#181D33

#332E18

Analogous

#182A33

#201833

#181D33

Triadic

#181D33

#33181D

#1D3318

Split Complementary

#181D33

#332018

#2A3318

Tetradic

#181D33

#33182A

#332E18

#183320

Color Blindness Simulation

Original

#181D33

Protanopia

#1A1A2E

Deuteranopia

#1A192C

Tritanopia

#182929

Achromatopsia

#1E1E1E

CSS Usage

background-color: #181D33;
color: #181D33;
border-color: #181D33;
Nearest Tailwind: Slate 900 #0F172A

Tailwind Shades

50
#F5F6FA
100
#E8EAF3
200
#CED3E8
300
#ACB4D8
400
#7F8BC3
500
#5263AD
600
#414F8B
700
#343F6F
800
#293157
900
#212740
950
#151829

Contrast Checker

Text on white

16.64:1

AA Pass AAA Pass

Text on black

1.26:1

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