#160716

CSS

:root {
  --glossy-black: #160716;
  --glossy-black-rgb: 22 7 22;
  --glossy-black-oklch: oklch(0.161 0.039 327.2);
}

.element {
  color: var(--glossy-black);
  background-color: hsl(300 52% 6%);
  border-color: oklch(0.161 0.039 327.2);
}

Tailwind CSS v4

@theme {
  --color-glossy-black: #160716;
  --color-glossy-black-50: #fcf1fb;
  --color-glossy-black-100: #f0e3ee;
  --color-glossy-black-200: #decfdc;
  --color-glossy-black-300: #c3b1c1;
  --color-glossy-black-400: #ab97ab;
  --color-glossy-black-500: #957d94;
  --color-glossy-black-600: #7e6a7d;
  --color-glossy-black-700: #655564;
  --color-glossy-black-800: #4a3e4a;
  --color-glossy-black-900: #332b33;
  --color-glossy-black-950: #1f181f;
}

SCSS

$glossy-black: #160716;
$glossy-black-rgb: 22, 7, 22;
$glossy-black-light: mix(#fff, $glossy-black, 20%);
$glossy-black-dark: mix(#000, $glossy-black, 20%);

.element {
  color: $glossy-black;
  box-shadow: 0 0 0 2px rgba($glossy-black, 0.35);
}