#697D44

CSS

:root {
  --beyond-the-pines: #697d44;
  --beyond-the-pines-rgb: 105 125 68;
  --beyond-the-pines-oklch: oklch(0.559 0.085 124.9);
}

.element {
  color: var(--beyond-the-pines);
  background-color: hsl(81 30% 38%);
  border-color: oklch(0.559 0.085 124.9);
}

Tailwind CSS v4

@theme {
  --color-beyond-the-pines: #697d44;
  --color-beyond-the-pines-50: #effae0;
  --color-beyond-the-pines-100: #e0eed0;
  --color-beyond-the-pines-200: #cadbb5;
  --color-beyond-the-pines-300: #acc091;
  --color-beyond-the-pines-400: #93a770;
  --color-beyond-the-pines-500: #799050;
  --color-beyond-the-pines-600: #677a44;
  --color-beyond-the-pines-700: #526236;
  --color-beyond-the-pines-800: #3d4725;
  --color-beyond-the-pines-900: #2a3119;
  --color-beyond-the-pines-950: #171d09;
}

SCSS

$beyond-the-pines: #697d44;
$beyond-the-pines-rgb: 105, 125, 68;
$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);
}