#004329

CSS

:root {
  --lost-in-the-woods: #004329;
  --lost-in-the-woods-rgb: 0 67 41;
  --lost-in-the-woods-oklch: oklch(0.338 0.077 159.8);
}

.element {
  color: var(--lost-in-the-woods);
  background-color: hsl(157 100% 13%);
  border-color: oklch(0.338 0.077 159.8);
}

Tailwind CSS v4

@theme {
  --color-lost-in-the-woods: #004329;
  --color-lost-in-the-woods-50: #e3fcee;
  --color-lost-in-the-woods-100: #d2f0e0;
  --color-lost-in-the-woods-200: #b8dfca;
  --color-lost-in-the-woods-300: #95c4ab;
  --color-lost-in-the-woods-400: #76ad8f;
  --color-lost-in-the-woods-500: #569674;
  --color-lost-in-the-woods-600: #497f63;
  --color-lost-in-the-woods-700: #3a664f;
  --color-lost-in-the-woods-800: #2a4b38;
  --color-lost-in-the-woods-900: #1c3426;
  --color-lost-in-the-woods-950: #0c1f15;
}

SCSS

$lost-in-the-woods: #004329;
$lost-in-the-woods-rgb: 0, 67, 41;
$lost-in-the-woods-light: mix(#fff, $lost-in-the-woods, 20%);
$lost-in-the-woods-dark: mix(#000, $lost-in-the-woods, 20%);

.element {
  color: $lost-in-the-woods;
  box-shadow: 0 0 0 2px rgba($lost-in-the-woods, 0.35);
}