#657C4B

CSS

:root {
  --beyond-the-pines: #657c4b;
  --beyond-the-pines-rgb: 101 124 75;
  --beyond-the-pines-oklch: oklch(0.555 0.076 129.1);
}

.element {
  color: var(--beyond-the-pines);
  background-color: hsl(88 25% 39%);
  border-color: oklch(0.555 0.076 129.1);
}

Tailwind CSS v4

@theme {
  --color-beyond-the-pines: #657c4b;
  --color-beyond-the-pines-50: #eefae4;
  --color-beyond-the-pines-100: #dfeed3;
  --color-beyond-the-pines-200: #c9dcba;
  --color-beyond-the-pines-300: #aac097;
  --color-beyond-the-pines-400: #90a877;
  --color-beyond-the-pines-500: #769059;
  --color-beyond-the-pines-600: #647a4c;
  --color-beyond-the-pines-700: #50623c;
  --color-beyond-the-pines-800: #3b472a;
  --color-beyond-the-pines-900: #29311c;
  --color-beyond-the-pines-950: #161d0c;
}

SCSS

$beyond-the-pines: #657c4b;
$beyond-the-pines-rgb: 101, 124, 75;
$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);
}