#183D6A

#183D6A

Color Values

HEX

#183D6A

RGB

24, 61, 106

HSL

212.9, 63.1%, 25.5%

HSV

212.9, 77.4%, 41.6%

CMYK

77.4%, 42.5%, 0.0%, 58.4%

OKLCH

0.3585 0.0889 255.0

Properties

Cool Dark Nearest: Midnight Blue

Color Harmonies

Complementary

#183D6A

#6A4518

Analogous

#18666A

#1C186A

#183D6A

Triadic

#183D6A

#6A183D

#3D6A18

Split Complementary

#183D6A

#6A1C18

#666A18

Tetradic

#183D6A

#6A1866

#6A4518

#186A1C

Color Blindness Simulation

Original

#183D6A

Protanopia

#28285F

Deuteranopia

#26235C

Tritanopia

#1A5755

Achromatopsia

#383838

CSS Usage

background-color: #183D6A;
color: #183D6A;
border-color: #183D6A;
Nearest Tailwind: Sky 900 #0C4A6E

Tailwind Shades

50
#F3F7FB
100
#E4ECF7
200
#C5D9F2
300
#9BBEE8
400
#659BDC
500
#2F78D0
600
#2660A6
700
#1E4D85
800
#183C68
900
#152E4C
950
#0D1D30

Contrast Checker

Text on white

10.97:1

AA Pass AAA Pass

Text on black

1.91:1

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