#18182B

#18182B

Color Values

HEX

#18182B

RGB

24, 24, 43

HSL

240.0, 28.4%, 13.1%

HSV

240.0, 44.2%, 16.9%

CMYK

44.2%, 44.2%, 0.0%, 83.1%

OKLCH

0.2193 0.0369 282.9

Properties

Cool Dark Nearest: RAL 5003 Sapphire Blue

Color Harmonies

Complementary

#18182B

#2B2B18

Analogous

#18212B

#21182B

#18182B

Triadic

#18182B

#2B1818

#182B18

Split Complementary

#18182B

#2B2118

#212B18

Tetradic

#18182B

#2B1821

#2B2B18

#182B21

Color Blindness Simulation

Original

#18182B

Protanopia

#181826

Deuteranopia

#181825

Tritanopia

#182322

Achromatopsia

#191919

CSS Usage

background-color: #18182B;
color: #18182B;
border-color: #18182B;
Nearest Tailwind: Slate 900 #0F172A

Tailwind Shades

50
#F6F6F9
100
#E9E9F1
200
#D1D1E5
300
#B0B0D3
400
#8686BB
500
#5B5BA4
600
#494983
700
#3A3A69
800
#2E2E52
900
#24243D
950
#171726

Contrast Checker

Text on white

17.44:1

AA Pass AAA Pass

Text on black

1.2:1

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