#677D4F

CSS

:root {
  --beyond-the-pines: #677d4f;
  --beyond-the-pines-rgb: 103 125 79;
  --beyond-the-pines-oklch: oklch(0.56 0.072 129.3);
}

.element {
  color: var(--beyond-the-pines);
  background-color: hsl(89 23% 40%);
  border-color: oklch(0.56 0.072 129.3);
}

Tailwind CSS v4

@theme {
  --color-beyond-the-pines: #677d4f;
  --color-beyond-the-pines-50: #eefae5;
  --color-beyond-the-pines-100: #dfedd5;
  --color-beyond-the-pines-200: #c9dbbb;
  --color-beyond-the-pines-300: #aac099;
  --color-beyond-the-pines-400: #91a77a;
  --color-beyond-the-pines-500: #77905c;
  --color-beyond-the-pines-600: #657a4e;
  --color-beyond-the-pines-700: #51613e;
  --color-beyond-the-pines-800: #3b472c;
  --color-beyond-the-pines-900: #29311d;
  --color-beyond-the-pines-950: #171d0d;
}

SCSS

$beyond-the-pines: #677d4f;
$beyond-the-pines-rgb: 103, 125, 79;
$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);
}