#A26763

CSS

:root {
  --rustling-leaves: #a26763;
  --rustling-leaves-rgb: 162 103 99;
  --rustling-leaves-oklch: oklch(0.576 0.077 24);
}

.element {
  color: var(--rustling-leaves);
  background-color: hsl(4 25% 51%);
  border-color: oklch(0.576 0.077 24);
}

Tailwind CSS v4

@theme {
  --color-rustling-leaves: #a26763;
  --color-rustling-leaves-50: #ffedea;
  --color-rustling-leaves-100: #ffdfdb;
  --color-rustling-leaves-200: #f4c8c3;
  --color-rustling-leaves-300: #dca9a3;
  --color-rustling-leaves-400: #c88d88;
  --color-rustling-leaves-500: #b4726d;
  --color-rustling-leaves-600: #98605d;
  --color-rustling-leaves-700: #7a4d4a;
  --color-rustling-leaves-800: #5a3836;
  --color-rustling-leaves-900: #3f2625;
  --color-rustling-leaves-950: #281414;
}

SCSS

$rustling-leaves: #a26763;
$rustling-leaves-rgb: 162, 103, 99;
$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);
}