#0E2C22

CSS

:root {
  --pitch-black-forests: #0e2c22;
  --pitch-black-forests-rgb: 14 44 34;
  --pitch-black-forests-oklch: oklch(0.267 0.041 168.5);
}

.element {
  color: var(--pitch-black-forests);
  background-color: hsl(160 52% 11%);
  border-color: oklch(0.267 0.041 168.5);
}

Tailwind CSS v4

@theme {
  --color-pitch-black-forests: #0e2c22;
  --color-pitch-black-forests-50: #eaf9f3;
  --color-pitch-black-forests-100: #dbede6;
  --color-pitch-black-forests-200: #c4dad2;
  --color-pitch-black-forests-300: #a4bfb4;
  --color-pitch-black-forests-400: #88a79a;
  --color-pitch-black-forests-500: #6c8f81;
  --color-pitch-black-forests-600: #5c796d;
  --color-pitch-black-forests-700: #496157;
  --color-pitch-black-forests-800: #35473f;
  --color-pitch-black-forests-900: #24312c;
  --color-pitch-black-forests-950: #131d19;
}

SCSS

$pitch-black-forests: #0e2c22;
$pitch-black-forests-rgb: 14, 44, 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);
}