#003027

CSS

:root {
  --pitch-black-forests: #003027;
  --pitch-black-forests-rgb: 0 48 39;
  --pitch-black-forests-oklch: oklch(0.276 0.052 176.1);
}

.element {
  color: var(--pitch-black-forests);
  background-color: hsl(169 100% 9%);
  border-color: oklch(0.276 0.052 176.1);
}

Tailwind CSS v4

@theme {
  --color-pitch-black-forests: #003027;
  --color-pitch-black-forests-50: #e6faf5;
  --color-pitch-black-forests-100: #d7eee8;
  --color-pitch-black-forests-200: #bedcd4;
  --color-pitch-black-forests-300: #9cc1b7;
  --color-pitch-black-forests-400: #7ea99d;
  --color-pitch-black-forests-500: #609285;
  --color-pitch-black-forests-600: #527b70;
  --color-pitch-black-forests-700: #41635a;
  --color-pitch-black-forests-800: #2f4841;
  --color-pitch-black-forests-900: #20322d;
  --color-pitch-black-forests-950: #0f1e1a;
}

SCSS

$pitch-black-forests: #003027;
$pitch-black-forests-rgb: 0, 48, 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);
}