#0C0B0D

CSS

:root {
  --black-sheep: #0c0b0d;
  --black-sheep-rgb: 12 11 13;
  --black-sheep-oklch: oklch(0.152 0.005 308.1);
}

.element {
  color: var(--black-sheep);
  background-color: hsl(270 8% 5%);
  border-color: oklch(0.152 0.005 308.1);
}

Tailwind CSS v4

@theme {
  --color-black-sheep: #0c0b0d;
  --color-black-sheep-50: #f5f5f6;
  --color-black-sheep-100: #e8e7e9;
  --color-black-sheep-200: #d5d4d6;
  --color-black-sheep-300: #b8b7b9;
  --color-black-sheep-400: #9f9ea0;
  --color-black-sheep-500: #878588;
  --color-black-sheep-600: #727173;
  --color-black-sheep-700: #5b5a5c;
  --color-black-sheep-800: #434244;
  --color-black-sheep-900: #2e2d2f;
  --color-black-sheep-950: #1b1a1b;
}

SCSS

$black-sheep: #0c0b0d;
$black-sheep-rgb: 12, 11, 13;
$black-sheep-light: mix(#fff, $black-sheep, 20%);
$black-sheep-dark: mix(#000, $black-sheep, 20%);

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