#181723

#181723

Color Values

HEX

#181723

RGB

24, 23, 35

HSL

245.0, 20.7%, 11.4%

HSV

245.0, 34.3%, 13.7%

CMYK

31.4%, 34.3%, 0.0%, 86.3%

OKLCH

0.2117 0.0235 288.0

Properties

Cool Dark Nearest: RAL 5011 Steel Blue

Color Harmonies

Complementary

#181723

#222317

Analogous

#171C23

#1E1723

#181723

Triadic

#181723

#231817

#172318

Split Complementary

#181723

#231E17

#1C2317

Tetradic

#181723

#23171C

#222317

#17231E

Color Blindness Simulation

Original

#181723

Protanopia

#181820

Deuteranopia

#18181F

Tritanopia

#181E1D

Achromatopsia

#181818

CSS Usage

background-color: #181723;
color: #181723;
border-color: #181723;
Nearest Tailwind: Gray 900 #111827

Tailwind Shades

50
#F6F6F9
100
#EBEAF0
200
#D5D4E3
300
#B7B5CE
400
#908DB4
500
#6A659A
600
#54517B
700
#444162
800
#35334D
900
#292739
950
#1A1924

Contrast Checker

Text on white

17.71:1

AA Pass AAA Pass

Text on black

1.19:1

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