#181C5F

#181C5F

Color Values

HEX

#181C5F

RGB

24, 28, 95

HSL

236.6, 59.7%, 23.3%

HSV

236.6, 74.7%, 37.3%

CMYK

74.7%, 70.5%, 0.0%, 62.7%

OKLCH

0.274 0.1167 273.1

Properties

Cool Dark Nearest: RAL 5005 Signal Blue

Color Harmonies

Complementary

#181C5F

#5F5B18

Analogous

#183F5F

#37185F

#181C5F

Triadic

#181C5F

#5F181C

#1C5F18

Split Complementary

#181C5F

#5F3718

#3F5F18

Tetradic

#181C5F

#5F183F

#5F5B18

#185F37

Color Blindness Simulation

Original

#181C5F

Protanopia

#1A1A4F

Deuteranopia

#1A194B

Tritanopia

#18423F

Achromatopsia

#202020

CSS Usage

background-color: #181C5F;
color: #181C5F;
border-color: #181C5F;
Nearest Tailwind: Indigo 900 #312E81

Tailwind Shades

50
#F3F4FB
100
#E4E5F6
200
#C6C8F1
300
#9DA1E6
400
#686FD9
500
#333CCC
600
#2930A3
700
#212682
800
#1A1E66
900
#16194A
950
#0E102F

Contrast Checker

Text on white

15.33:1

AA Pass AAA Pass

Text on black

1.37:1

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