#00362A

CSS

:root {
  --pitch-black-forests: #00362a;
  --pitch-black-forests-rgb: 0 54 42;
  --pitch-black-forests-oklch: oklch(0.297 0.057 172.7);
}

.element {
  color: var(--pitch-black-forests);
  background-color: hsl(167 100% 11%);
  border-color: oklch(0.297 0.057 172.7);
}

Tailwind CSS v4

@theme {
  --color-pitch-black-forests: #00362a;
  --color-pitch-black-forests-50: #e5fbf4;
  --color-pitch-black-forests-100: #d5efe7;
  --color-pitch-black-forests-200: #bcddd3;
  --color-pitch-black-forests-300: #9ac1b5;
  --color-pitch-black-forests-400: #7caa9b;
  --color-pitch-black-forests-500: #5d9382;
  --color-pitch-black-forests-600: #4f7c6e;
  --color-pitch-black-forests-700: #3f6358;
  --color-pitch-black-forests-800: #2e4940;
  --color-pitch-black-forests-900: #1f332c;
  --color-pitch-black-forests-950: #0e1e19;
}

SCSS

$pitch-black-forests: #00362a;
$pitch-black-forests-rgb: 0, 54, 42;
$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);
}