#002613

CSS

:root {
  --pitch-black-forests: #002613;
  --pitch-black-forests-rgb: 0 38 19;
  --pitch-black-forests-oklch: oklch(0.236 0.056 156.8);
}

.element {
  color: var(--pitch-black-forests);
  background-color: hsl(150 100% 7%);
  border-color: oklch(0.236 0.056 156.8);
}

Tailwind CSS v4

@theme {
  --color-pitch-black-forests: #002613;
  --color-pitch-black-forests-50: #e8faef;
  --color-pitch-black-forests-100: #d9eee1;
  --color-pitch-black-forests-200: #c1dccb;
  --color-pitch-black-forests-300: #a0c1ad;
  --color-pitch-black-forests-400: #83a991;
  --color-pitch-black-forests-500: #679277;
  --color-pitch-black-forests-600: #577b65;
  --color-pitch-black-forests-700: #466351;
  --color-pitch-black-forests-800: #33483a;
  --color-pitch-black-forests-900: #223228;
  --color-pitch-black-forests-950: #111e16;
}

SCSS

$pitch-black-forests: #002613;
$pitch-black-forests-rgb: 0, 38, 19;
$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);
}