#121723

#121723

Color Values

HEX

#121723

RGB

18, 23, 35

HSL

222.4, 32.1%, 10.4%

HSV

222.4, 48.6%, 13.7%

CMYK

48.6%, 34.3%, 0.0%, 86.3%

OKLCH

0.2056 0.0253 266.8

Properties

Cool Dark Nearest: RAL 5004 Black Blue

Color Harmonies

Complementary

#121723

#231E12

Analogous

#122023

#161223

#121723

Triadic

#121723

#231217

#172312

Split Complementary

#121723

#231612

#202312

Tetradic

#121723

#231220

#231E12

#122316

Color Blindness Simulation

Original

#121723

Protanopia

#141420

Deuteranopia

#14141F

Tritanopia

#121E1D

Achromatopsia

#171717

CSS Usage

background-color: #121723;
color: #121723;
border-color: #121723;
Nearest Tailwind: Gray 900 #111827

Tailwind Shades

50
#F5F6F9
100
#E8EBF2
200
#D0D7E7
300
#AEBAD5
400
#8294BF
500
#576FA8
600
#455887
700
#37476C
800
#2B3754
900
#222B3E
950
#161B27

Contrast Checker

Text on white

17.91:1

AA Pass AAA Pass

Text on black

1.17:1

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