#687D4B

CSS

:root {
  --beyond-the-pines: #687d4b;
  --beyond-the-pines-rgb: 104 125 75;
  --beyond-the-pines-oklch: oklch(0.56 0.077 127.3);
}

.element {
  color: var(--beyond-the-pines);
  background-color: hsl(85 25% 39%);
  border-color: oklch(0.56 0.077 127.3);
}

Tailwind CSS v4

@theme {
  --color-beyond-the-pines: #687d4b;
  --color-beyond-the-pines-50: #eefae3;
  --color-beyond-the-pines-100: #e0edd3;
  --color-beyond-the-pines-200: #cadbb9;
  --color-beyond-the-pines-300: #abc096;
  --color-beyond-the-pines-400: #92a776;
  --color-beyond-the-pines-500: #789057;
  --color-beyond-the-pines-600: #667a4b;
  --color-beyond-the-pines-700: #51613b;
  --color-beyond-the-pines-800: #3c4729;
  --color-beyond-the-pines-900: #29311c;
  --color-beyond-the-pines-950: #171d0c;
}

SCSS

$beyond-the-pines: #687d4b;
$beyond-the-pines-rgb: 104, 125, 75;
$beyond-the-pines-light: mix(#fff, $beyond-the-pines, 20%);
$beyond-the-pines-dark: mix(#000, $beyond-the-pines, 20%);

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