#9C6764

CSS

:root {
  --rustling-leaves: #9c6764;
  --rustling-leaves-rgb: 156 103 100;
  --rustling-leaves-oklch: oklch(0.569 0.069 23);
}

.element {
  color: var(--rustling-leaves);
  background-color: hsl(3 22% 50%);
  border-color: oklch(0.569 0.069 23);
}

Tailwind CSS v4

@theme {
  --color-rustling-leaves: #9c6764;
  --color-rustling-leaves-50: #ffeeeb;
  --color-rustling-leaves-100: #fee0dc;
  --color-rustling-leaves-200: #f1cac5;
  --color-rustling-leaves-300: #d9aaa6;
  --color-rustling-leaves-400: #c48f8b;
  --color-rustling-leaves-500: #af7471;
  --color-rustling-leaves-600: #94625f;
  --color-rustling-leaves-700: #774f4c;
  --color-rustling-leaves-800: #583938;
  --color-rustling-leaves-900: #3e2726;
  --color-rustling-leaves-950: #271515;
}

SCSS

$rustling-leaves: #9c6764;
$rustling-leaves-rgb: 156, 103, 100;
$rustling-leaves-light: mix(#fff, $rustling-leaves, 20%);
$rustling-leaves-dark: mix(#000, $rustling-leaves, 20%);

.element {
  color: $rustling-leaves;
  box-shadow: 0 0 0 2px rgba($rustling-leaves, 0.35);
}