#002F20

CSS

:root {
  --pitch-black-forests: #002f20;
  --pitch-black-forests-rgb: 0 47 32;
  --pitch-black-forests-oklch: oklch(0.271 0.056 165.8);
}

.element {
  color: var(--pitch-black-forests);
  background-color: hsl(161 100% 9%);
  border-color: oklch(0.271 0.056 165.8);
}

Tailwind CSS v4

@theme {
  --color-pitch-black-forests: #002f20;
  --color-pitch-black-forests-50: #e7fbf2;
  --color-pitch-black-forests-100: #d7eee4;
  --color-pitch-black-forests-200: #bedccf;
  --color-pitch-black-forests-300: #9cc1b2;
  --color-pitch-black-forests-400: #7fa997;
  --color-pitch-black-forests-500: #61927d;
  --color-pitch-black-forests-600: #537c6a;
  --color-pitch-black-forests-700: #426355;
  --color-pitch-black-forests-800: #30493d;
  --color-pitch-black-forests-900: #20322a;
  --color-pitch-black-forests-950: #101e18;
}

SCSS

$pitch-black-forests: #002f20;
$pitch-black-forests-rgb: 0, 47, 32;
$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);
}