#687C41

CSS

:root {
  --beyond-the-pines: #687c41;
  --beyond-the-pines-rgb: 104 124 65;
  --beyond-the-pines-oklch: oklch(0.556 0.087 124.5);
}

.element {
  color: var(--beyond-the-pines);
  background-color: hsl(80 31% 37%);
  border-color: oklch(0.556 0.087 124.5);
}

Tailwind CSS v4

@theme {
  --color-beyond-the-pines: #687c41;
  --color-beyond-the-pines-50: #effae0;
  --color-beyond-the-pines-100: #e0eecf;
  --color-beyond-the-pines-200: #cadcb4;
  --color-beyond-the-pines-300: #acc090;
  --color-beyond-the-pines-400: #93a86e;
  --color-beyond-the-pines-500: #79904e;
  --color-beyond-the-pines-600: #677a42;
  --color-beyond-the-pines-700: #526235;
  --color-beyond-the-pines-800: #3d4724;
  --color-beyond-the-pines-900: #2a3118;
  --color-beyond-the-pines-950: #171d09;
}

SCSS

$beyond-the-pines: #687c41;
$beyond-the-pines-rgb: 104, 124, 65;
$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);
}