#0A2A16

CSS

:root {
  --pitch-black-forests: #0a2a16;
  --pitch-black-forests-rgb: 10 42 22;
  --pitch-black-forests-oklch: oklch(0.255 0.053 152.9);
}

.element {
  color: var(--pitch-black-forests);
  background-color: hsl(143 62% 10%);
  border-color: oklch(0.255 0.053 152.9);
}

Tailwind CSS v4

@theme {
  --color-pitch-black-forests: #0a2a16;
  --color-pitch-black-forests-50: #eafaef;
  --color-pitch-black-forests-100: #dbede0;
  --color-pitch-black-forests-200: #c3dbca;
  --color-pitch-black-forests-300: #a3c0ac;
  --color-pitch-black-forests-400: #87a890;
  --color-pitch-black-forests-500: #6b9175;
  --color-pitch-black-forests-600: #5b7a64;
  --color-pitch-black-forests-700: #49624f;
  --color-pitch-black-forests-800: #354839;
  --color-pitch-black-forests-900: #243227;
  --color-pitch-black-forests-950: #131e15;
}

SCSS

$pitch-black-forests: #0a2a16;
$pitch-black-forests-rgb: 10, 42, 22;
$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);
}