#A4665B

CSS

:root {
  --rustling-leaves: #a4665b;
  --rustling-leaves-rgb: 164 102 91;
  --rustling-leaves-oklch: oklch(0.575 0.083 30.7);
}

.element {
  color: var(--rustling-leaves);
  background-color: hsl(9 29% 50%);
  border-color: oklch(0.575 0.083 30.7);
}

Tailwind CSS v4

@theme {
  --color-rustling-leaves: #a4665b;
  --color-rustling-leaves-50: #ffede6;
  --color-rustling-leaves-100: #ffdfd7;
  --color-rustling-leaves-200: #f5c8be;
  --color-rustling-leaves-300: #dea99d;
  --color-rustling-leaves-400: #cb8c81;
  --color-rustling-leaves-500: #b67165;
  --color-rustling-leaves-600: #9a6055;
  --color-rustling-leaves-700: #7c4c44;
  --color-rustling-leaves-800: #5c3732;
  --color-rustling-leaves-900: #402622;
  --color-rustling-leaves-950: #291411;
}

SCSS

$rustling-leaves: #a4665b;
$rustling-leaves-rgb: 164, 102, 91;
$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);
}