#081006

CSS

:root {
  --blackn-t: #081006;
  --blackn-t-rgb: 8 16 6;
  --blackn-t-oklch: oklch(0.161 0.025 138.6);
}

.element {
  color: var(--blackn-t);
  background-color: hsl(108 45% 4%);
  border-color: oklch(0.161 0.025 138.6);
}

Tailwind CSS v4

@theme {
  --color-blackn-t: #081006;
  --color-blackn-t-50: #f1f7f0;
  --color-blackn-t-100: #e4eae2;
  --color-blackn-t-200: #cfd7cd;
  --color-blackn-t-300: #b1bbaf;
  --color-blackn-t-400: #97a294;
  --color-blackn-t-500: #7e8a7b;
  --color-blackn-t-600: #6b7568;
  --color-blackn-t-700: #555e53;
  --color-blackn-t-800: #3e443c;
  --color-blackn-t-900: #2b2f29;
  --color-blackn-t-950: #181c17;
}

SCSS

$blackn-t: #081006;
$blackn-t-rgb: 8, 16, 6;
$blackn-t-light: mix(#fff, $blackn-t, 20%);
$blackn-t-dark: mix(#000, $blackn-t, 20%);

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