#18203F

#18203F

Color Values

HEX

#18203F

RGB

24, 32, 63

HSL

227.7, 44.8%, 17.1%

HSV

227.7, 61.9%, 24.7%

CMYK

61.9%, 49.2%, 0.0%, 75.3%

OKLCH

0.2539 0.0595 270.8

Properties

Cool Dark Nearest: RAL 5013 Cobalt Blue

Color Harmonies

Complementary

#18203F

#3F3718

Analogous

#18343F

#24183F

#18203F

Triadic

#18203F

#3F1820

#203F18

Split Complementary

#18203F

#3F2418

#343F18

Tetradic

#18203F

#3F1834

#3F3718

#183F24

Color Blindness Simulation

Original

#18203F

Protanopia

#1B1C38

Deuteranopia

#1B1A36

Tritanopia

#183230

Achromatopsia

#212121

CSS Usage

background-color: #18203F;
color: #18203F;
border-color: #18203F;
Nearest Tailwind: Slate 900 #0F172A

Tailwind Shades

50
#F4F6FA
100
#E6E9F4
200
#CBD2EB
300
#A6B2DD
400
#7688CB
500
#465EB9
600
#384B94
700
#2D3C76
800
#232F5C
900
#1D2544
950
#12172B

Contrast Checker

Text on white

15.94:1

AA Pass AAA Pass

Text on black

1.32:1

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