#181D4B

#181D4B

Color Values

HEX

#181D4B

RGB

24, 29, 75

HSL

234.1, 51.5%, 19.4%

HSV

234.1, 68.0%, 29.4%

CMYK

68.0%, 61.3%, 0.0%, 70.6%

OKLCH

0.2566 0.0845 274.1

Properties

Cool Dark Nearest: RAL 5002 Ultramarine Blue

Color Harmonies

Complementary

#181D4B

#4B4618

Analogous

#18364B

#2C184B

#181D4B

Triadic

#181D4B

#4B181D

#1D4B18

Split Complementary

#181D4B

#4B2C18

#364B18

Tetradic

#181D4B

#4B1836

#4B4618

#184B2C

Color Blindness Simulation

Original

#181D4B

Protanopia

#1A1A40

Deuteranopia

#1A193D

Tritanopia

#183735

Achromatopsia

#1F1F1F

CSS Usage

background-color: #181D4B;
color: #181D4B;
border-color: #181D4B;
Nearest Tailwind: Indigo 950 #1E1B4B

Tailwind Shades

50
#F4F5FB
100
#E5E7F5
200
#C9CDEE
300
#A2A8E1
400
#707AD1
500
#3E4BC1
600
#313C9B
700
#28307C
800
#1F2561
900
#1A1E47
950
#10132D

Contrast Checker

Text on white

15.96:1

AA Pass AAA Pass

Text on black

1.32:1

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