#0D0B0E

CSS

:root {
  --black-sheep: #0d0b0e;
  --black-sheep-rgb: 13 11 14;
  --black-sheep-oklch: oklch(0.154 0.007 314.6);
}

.element {
  color: var(--black-sheep);
  background-color: hsl(280 12% 5%);
  border-color: oklch(0.154 0.007 314.6);
}

Tailwind CSS v4

@theme {
  --color-black-sheep: #0d0b0e;
  --color-black-sheep-50: #f6f4f6;
  --color-black-sheep-100: #e9e7e9;
  --color-black-sheep-200: #d5d3d6;
  --color-black-sheep-300: #b9b6ba;
  --color-black-sheep-400: #a09da1;
  --color-black-sheep-500: #888589;
  --color-black-sheep-600: #737074;
  --color-black-sheep-700: #5c5a5d;
  --color-black-sheep-800: #434244;
  --color-black-sheep-900: #2e2d2f;
  --color-black-sheep-950: #1b1a1c;
}

SCSS

$black-sheep: #0d0b0e;
$black-sheep-rgb: 13, 11, 14;
$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);
}