#61803D

CSS

:root {
  --beyond-the-pines: #61803d;
  --beyond-the-pines-rgb: 97 128 61;
  --beyond-the-pines-oklch: oklch(0.56 0.101 129.6);
}

.element {
  color: var(--beyond-the-pines);
  background-color: hsl(88 35% 37%);
  border-color: oklch(0.56 0.101 129.6);
}

Tailwind CSS v4

@theme {
  --color-beyond-the-pines: #61803d;
  --color-beyond-the-pines-50: #ebfcde;
  --color-beyond-the-pines-100: #dcf0cd;
  --color-beyond-the-pines-200: #c5deb1;
  --color-beyond-the-pines-300: #a5c38d;
  --color-beyond-the-pines-400: #8baa6a;
  --color-beyond-the-pines-500: #709348;
  --color-beyond-the-pines-600: #5f7d3e;
  --color-beyond-the-pines-700: #4c6431;
  --color-beyond-the-pines-800: #384921;
  --color-beyond-the-pines-900: #273316;
  --color-beyond-the-pines-950: #151e07;
}

SCSS

$beyond-the-pines: #61803d;
$beyond-the-pines-rgb: 97, 128, 61;
$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);
}