#002F22

CSS

:root {
  --pitch-black-forests: #002f22;
  --pitch-black-forests-rgb: 0 47 34;
  --pitch-black-forests-oklch: oklch(0.271 0.054 168.9);
}

.element {
  color: var(--pitch-black-forests);
  background-color: hsl(163 100% 9%);
  border-color: oklch(0.271 0.054 168.9);
}

Tailwind CSS v4

@theme {
  --color-pitch-black-forests: #002f22;
  --color-pitch-black-forests-50: #e7fbf3;
  --color-pitch-black-forests-100: #d7eee5;
  --color-pitch-black-forests-200: #bedcd1;
  --color-pitch-black-forests-300: #9cc1b4;
  --color-pitch-black-forests-400: #7fa999;
  --color-pitch-black-forests-500: #619280;
  --color-pitch-black-forests-600: #537c6c;
  --color-pitch-black-forests-700: #426357;
  --color-pitch-black-forests-800: #30493e;
  --color-pitch-black-forests-900: #20322b;
  --color-pitch-black-forests-950: #101e18;
}

SCSS

$pitch-black-forests: #002f22;
$pitch-black-forests-rgb: 0, 47, 34;
$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);
}