#7F6855

CSS

:root {
  --pastel-brown: #7f6855;
  --pastel-brown-rgb: 127 104 85;
  --pastel-brown-oklch: oklch(0.534 0.041 61.3);
}

.element {
  color: var(--pastel-brown);
  background-color: hsl(27 20% 42%);
  border-color: oklch(0.534 0.041 61.3);
}

Tailwind CSS v4

@theme {
  --color-pastel-brown: #7f6855;
  --color-pastel-brown-50: #fef3e9;
  --color-pastel-brown-100: #f2e5da;
  --color-pastel-brown-200: #e1d1c3;
  --color-pastel-brown-300: #c7b3a2;
  --color-pastel-brown-400: #b19986;
  --color-pastel-brown-500: #9b806b;
  --color-pastel-brown-600: #836d5b;
  --color-pastel-brown-700: #695748;
  --color-pastel-brown-800: #4d3f34;
  --color-pastel-brown-900: #362b24;
  --color-pastel-brown-950: #211913;
}

SCSS

$pastel-brown: #7f6855;
$pastel-brown-rgb: 127, 104, 85;
$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);
}