#5D7E63

CSS

:root {
  --clouded-pine: #5d7e63;
  --clouded-pine-rgb: 93 126 99;
  --clouded-pine-oklch: oklch(0.56 0.056 149.8);
}

.element {
  color: var(--clouded-pine);
  background-color: hsl(131 15% 43%);
  border-color: oklch(0.56 0.056 149.8);
}

Tailwind CSS v4

@theme {
  --color-clouded-pine: #5d7e63;
  --color-clouded-pine-50: #eafaed;
  --color-clouded-pine-100: #dbeedf;
  --color-clouded-pine-200: #c3dcc9;
  --color-clouded-pine-300: #a3c0a9;
  --color-clouded-pine-400: #88a88d;
  --color-clouded-pine-500: #6c9173;
  --color-clouded-pine-600: #5b7b61;
  --color-clouded-pine-700: #49624d;
  --color-clouded-pine-800: #354837;
  --color-clouded-pine-900: #243226;
  --color-clouded-pine-950: #131e14;
}

SCSS

$clouded-pine: #5d7e63;
$clouded-pine-rgb: 93, 126, 99;
$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);
}