#181B44

#181B44

Color Values

HEX

#181B44

RGB

24, 27, 68

HSL

235.9, 47.8%, 18.0%

HSV

235.9, 64.7%, 26.7%

CMYK

64.7%, 60.3%, 0.0%, 73.3%

OKLCH

0.2459 0.0761 276.1

Properties

Cool Dark Nearest: RAL 5002 Ultramarine Blue

Color Harmonies

Complementary

#181B44

#444118

Analogous

#183144

#2B1844

#181B44

Triadic

#181B44

#44181B

#1B4418

Split Complementary

#181B44

#442B18

#314418

Tetradic

#181B44

#441831

#444118

#18442B

Color Blindness Simulation

Original

#181B44

Protanopia

#19193A

Deuteranopia

#191938

Tritanopia

#183231

Achromatopsia

#1D1D1D

CSS Usage

background-color: #181B44;
color: #181B44;
border-color: #181B44;
Nearest Tailwind: Indigo 950 #1E1B4B

Tailwind Shades

50
#F4F5FA
100
#E6E7F4
200
#CACDEC
300
#A5A9DF
400
#747ACE
500
#434BBC
600
#353C97
700
#2B3079
800
#21255E
900
#1C1E45
950
#11132C

Contrast Checker

Text on white

16.42:1

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