#00361E

CSS

:root {
  --pitch-black-forests: #00361e;
  --pitch-black-forests-rgb: 0 54 30;
  --pitch-black-forests-oklch: oklch(0.293 0.069 157.6);
}

.element {
  color: var(--pitch-black-forests);
  background-color: hsl(153 100% 11%);
  border-color: oklch(0.293 0.069 157.6);
}

Tailwind CSS v4

@theme {
  --color-pitch-black-forests: #00361e;
  --color-pitch-black-forests-50: #e5fcee;
  --color-pitch-black-forests-100: #d5efe0;
  --color-pitch-black-forests-200: #bcdeca;
  --color-pitch-black-forests-300: #9ac3ab;
  --color-pitch-black-forests-400: #7cab8f;
  --color-pitch-black-forests-500: #5e9474;
  --color-pitch-black-forests-600: #507d63;
  --color-pitch-black-forests-700: #40644f;
  --color-pitch-black-forests-800: #2e4a38;
  --color-pitch-black-forests-900: #1f3326;
  --color-pitch-black-forests-950: #0f1f15;
}

SCSS

$pitch-black-forests: #00361e;
$pitch-black-forests-rgb: 0, 54, 30;
$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);
}