#193727

CSS

:root {
  --pitch-black-forests: #193727;
  --pitch-black-forests-rgb: 25 55 39;
  --pitch-black-forests-oklch: oklch(0.308 0.047 158.7);
}

.element {
  color: var(--pitch-black-forests);
  background-color: hsl(148 38% 16%);
  border-color: oklch(0.308 0.047 158.7);
}

Tailwind CSS v4

@theme {
  --color-pitch-black-forests: #193727;
  --color-pitch-black-forests-50: #eafaf1;
  --color-pitch-black-forests-100: #dbede3;
  --color-pitch-black-forests-200: #c4dbce;
  --color-pitch-black-forests-300: #a3bfb0;
  --color-pitch-black-forests-400: #88a794;
  --color-pitch-black-forests-500: #6c907b;
  --color-pitch-black-forests-600: #5c7a68;
  --color-pitch-black-forests-700: #496153;
  --color-pitch-black-forests-800: #35473c;
  --color-pitch-black-forests-900: #243129;
  --color-pitch-black-forests-950: #131d17;
}

SCSS

$pitch-black-forests: #193727;
$pitch-black-forests-rgb: 25, 55, 39;
$pitch-black-forests-light: mix(#fff, $pitch-black-forests, 20%);
$pitch-black-forests-dark: mix(#000, $pitch-black-forests, 20%);

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