#687E3F

CSS

:root {
  --beyond-the-pines: #687e3f;
  --beyond-the-pines-rgb: 104 126 63;
  --beyond-the-pines-oklch: oklch(0.56 0.092 125.1);
}

.element {
  color: var(--beyond-the-pines);
  background-color: hsl(81 33% 37%);
  border-color: oklch(0.56 0.092 125.1);
}

Tailwind CSS v4

@theme {
  --color-beyond-the-pines: #687e3f;
  --color-beyond-the-pines-50: #eefbdf;
  --color-beyond-the-pines-100: #dfeecd;
  --color-beyond-the-pines-200: #c9dcb2;
  --color-beyond-the-pines-300: #abc18e;
  --color-beyond-the-pines-400: #92a86b;
  --color-beyond-the-pines-500: #78914a;
  --color-beyond-the-pines-600: #667b3f;
  --color-beyond-the-pines-700: #516232;
  --color-beyond-the-pines-800: #3c4822;
  --color-beyond-the-pines-900: #293217;
  --color-beyond-the-pines-950: #171d08;
}

SCSS

$beyond-the-pines: #687e3f;
$beyond-the-pines-rgb: 104, 126, 63;
$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);
}