#183F8B

#183F8B

Color Values

HEX

#183F8B

RGB

24, 63, 139

HSL

219.7, 70.6%, 32.0%

HSV

219.7, 82.7%, 54.5%

CMYK

82.7%, 54.7%, 0.0%, 45.5%

OKLCH

0.3885 0.1344 261.9

Properties

Cool Dark Nearest: royalblue 4

Color Harmonies

Complementary

#183F8B

#8B6418

Analogous

#18798B

#2B188B

#183F8B

Triadic

#183F8B

#8B183F

#3F8B18

Split Complementary

#183F8B

#8B2B18

#798B18

Tetradic

#183F8B

#8B1879

#8B6418

#188B2B

Color Blindness Simulation

Original

#183F8B

Protanopia

#292979

Deuteranopia

#272474

Tritanopia

#1A6A67

Achromatopsia

#3C3C3C

CSS Usage

background-color: #183F8B;
color: #183F8B;
border-color: #183F8B;
Nearest Tailwind: Blue 900 #1E3A8A

Tailwind Shades

50
#F3F6FC
100
#E2EAF8
200
#C2D3F5
300
#97B4ED
400
#5E8BE3
500
#2562DA
600
#1E4FAE
700
#183F8B
800
#13316D
900
#12264F
950
#0B1832

Contrast Checker

Text on white

9.89:1

AA Pass AAA Pass

Text on black

2.12:1

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