#5B7E42

CSS

:root {
  --beyond-the-pines: #5b7e42;
  --beyond-the-pines-rgb: 91 126 66;
  --beyond-the-pines-oklch: oklch(0.551 0.096 133.5);
}

.element {
  color: var(--beyond-the-pines);
  background-color: hsl(95 31% 38%);
  border-color: oklch(0.551 0.096 133.5);
}

Tailwind CSS v4

@theme {
  --color-beyond-the-pines: #5b7e42;
  --color-beyond-the-pines-50: #e9fce1;
  --color-beyond-the-pines-100: #daf0d0;
  --color-beyond-the-pines-200: #c3deb5;
  --color-beyond-the-pines-300: #a2c392;
  --color-beyond-the-pines-400: #88ab70;
  --color-beyond-the-pines-500: #6c9450;
  --color-beyond-the-pines-600: #5c7d44;
  --color-beyond-the-pines-700: #496436;
  --color-beyond-the-pines-800: #364925;
  --color-beyond-the-pines-900: #253319;
  --color-beyond-the-pines-950: #141e09;
}

SCSS

$beyond-the-pines: #5b7e42;
$beyond-the-pines-rgb: 91, 126, 66;
$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);
}