#657E47

CSS

:root {
  --beyond-the-pines: #657e47;
  --beyond-the-pines-rgb: 101 126 71;
  --beyond-the-pines-oklch: oklch(0.559 0.084 128.8);
}

.element {
  color: var(--beyond-the-pines);
  background-color: hsl(87 28% 39%);
  border-color: oklch(0.559 0.084 128.8);
}

Tailwind CSS v4

@theme {
  --color-beyond-the-pines: #657e47;
  --color-beyond-the-pines-50: #edfbe2;
  --color-beyond-the-pines-100: #deeed1;
  --color-beyond-the-pines-200: #c8dcb7;
  --color-beyond-the-pines-300: #a9c194;
  --color-beyond-the-pines-400: #8fa973;
  --color-beyond-the-pines-500: #759153;
  --color-beyond-the-pines-600: #637b47;
  --color-beyond-the-pines-700: #4f6238;
  --color-beyond-the-pines-800: #3b4827;
  --color-beyond-the-pines-900: #28321a;
  --color-beyond-the-pines-950: #161e0b;
}

SCSS

$beyond-the-pines: #657e47;
$beyond-the-pines-rgb: 101, 126, 71;
$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);
}