#18273F

#18273F

Color Values

HEX

#18273F

RGB

24, 39, 63

HSL

216.9, 44.8%, 17.1%

HSV

216.9, 61.9%, 24.7%

CMYK

61.9%, 38.1%, 0.0%, 75.3%

OKLCH

0.2722 0.0494 259.5

Properties

Cool Dark Nearest: RAL 5013 Cobalt Blue

Color Harmonies

Complementary

#18273F

#3F3018

Analogous

#183B3F

#1D183F

#18273F

Triadic

#18273F

#3F1827

#273F18

Split Complementary

#18273F

#3F1D18

#3B3F18

Tetradic

#18273F

#3F183B

#3F3018

#183F1D

Color Blindness Simulation

Original

#18273F

Protanopia

#1E1F39

Deuteranopia

#1E1C38

Tritanopia

#193534

Achromatopsia

#262626

CSS Usage

background-color: #18273F;
color: #18273F;
border-color: #18273F;
Nearest Tailwind: Slate 800 #1E293B

Tailwind Shades

50
#F4F7FA
100
#E6ECF4
200
#CBD8EB
300
#A6BBDD
400
#7697CB
500
#4672B9
600
#385B94
700
#2D4976
800
#23395C
900
#1D2C44
950
#121C2B

Contrast Checker

Text on white

14.99:1

AA Pass AAA Pass

Text on black

1.4:1

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