#84664B

CSS

:root {
  --pastel-brown: #84664b;
  --pastel-brown-rgb: 132 102 75;
  --pastel-brown-oklch: oklch(0.533 0.055 63.2);
}

.element {
  color: var(--pastel-brown);
  background-color: hsl(28 28% 41%);
  border-color: oklch(0.533 0.055 63.2);
}

Tailwind CSS v4

@theme {
  --color-pastel-brown: #84664b;
  --color-pastel-brown-50: #fff2e5;
  --color-pastel-brown-100: #f5e5d5;
  --color-pastel-brown-200: #e5d0bc;
  --color-pastel-brown-300: #ccb29a;
  --color-pastel-brown-400: #b6987d;
  --color-pastel-brown-500: #a17f60;
  --color-pastel-brown-600: #886b51;
  --color-pastel-brown-700: #6d5641;
  --color-pastel-brown-800: #513e2f;
  --color-pastel-brown-900: #382b20;
  --color-pastel-brown-950: #23180f;
}

SCSS

$pastel-brown: #84664b;
$pastel-brown-rgb: 132, 102, 75;
$pastel-brown-light: mix(#fff, $pastel-brown, 20%);
$pastel-brown-dark: mix(#000, $pastel-brown, 20%);

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