#558065

CSS

:root {
  --clouded-pine: #558065;
  --clouded-pine-rgb: 85 128 101;
  --clouded-pine-oklch: oklch(0.56 0.064 156.2);
}

.element {
  color: var(--clouded-pine);
  background-color: hsl(142 20% 42%);
  border-color: oklch(0.56 0.064 156.2);
}

Tailwind CSS v4

@theme {
  --color-clouded-pine: #558065;
  --color-clouded-pine-50: #e7fbee;
  --color-clouded-pine-100: #d7efe0;
  --color-clouded-pine-200: #bfddca;
  --color-clouded-pine-300: #9dc2ab;
  --color-clouded-pine-400: #80aa8f;
  --color-clouded-pine-500: #639375;
  --color-clouded-pine-600: #547c63;
  --color-clouded-pine-700: #43644f;
  --color-clouded-pine-800: #314938;
  --color-clouded-pine-900: #213327;
  --color-clouded-pine-950: #101e15;
}

SCSS

$clouded-pine: #558065;
$clouded-pine-rgb: 85, 128, 101;
$clouded-pine-light: mix(#fff, $clouded-pine, 20%);
$clouded-pine-dark: mix(#000, $clouded-pine, 20%);

.element {
  color: $clouded-pine;
  box-shadow: 0 0 0 2px rgba($clouded-pine, 0.35);
}