#183D65

#183D65

Color Values

HEX

#183D65

RGB

24, 61, 101

HSL

211.2, 61.6%, 24.5%

HSV

211.2, 76.2%, 39.6%

CMYK

76.2%, 39.6%, 0.0%, 60.4%

OKLCH

0.3551 0.0816 252.6

Properties

Cool Dark Nearest: Midnight Blue

Color Harmonies

Complementary

#183D65

#654018

Analogous

#186365

#1A1865

#183D65

Triadic

#183D65

#65183D

#3D6518

Split Complementary

#183D65

#651A18

#636518

Tetradic

#183D65

#651863

#654018

#18651A

Color Blindness Simulation

Original

#183D65

Protanopia

#28285B

Deuteranopia

#262359

Tritanopia

#1A5452

Achromatopsia

#383838

CSS Usage

background-color: #183D65;
color: #183D65;
border-color: #183D65;
Nearest Tailwind: Sky 900 #0C4A6E

Tailwind Shades

50
#F3F7FB
100
#E4EDF6
200
#C5DAF1
300
#9CC0E7
400
#679EDB
500
#317CCE
600
#2763A5
700
#1F5084
800
#183E67
900
#162F4B
950
#0E1E30

Contrast Checker

Text on white

11.09:1

AA Pass AAA Pass

Text on black

1.89:1

AA Fail AAA Fail

Related Articles

Tutorials

CSS color-mix(): Blend Colors Natively in the Browser

Jan 26, 2026
Tutorials

Building a Color Picker Web Component from Scratch

Jan 21, 2026
Tutorials

Perceptual Color Spaces: Lab, LCH, Oklab, OKLCH

Jan 15, 2026