#86664D

CSS

:root {
  --pastel-brown: #86664d;
  --pastel-brown-rgb: 134 102 77;
  --pastel-brown-oklch: oklch(0.536 0.055 59.2);
}

.element {
  color: var(--pastel-brown);
  background-color: hsl(26 27% 41%);
  border-color: oklch(0.536 0.055 59.2);
}

Tailwind CSS v4

@theme {
  --color-pastel-brown: #86664d;
  --color-pastel-brown-50: #fff2e6;
  --color-pastel-brown-100: #f6e4d6;
  --color-pastel-brown-200: #e6cfbd;
  --color-pastel-brown-300: #cdb29b;
  --color-pastel-brown-400: #b8977e;
  --color-pastel-brown-500: #a27e61;
  --color-pastel-brown-600: #896a53;
  --color-pastel-brown-700: #6e5542;
  --color-pastel-brown-800: #513e2f;
  --color-pastel-brown-900: #392a20;
  --color-pastel-brown-950: #231810;
}

SCSS

$pastel-brown: #86664d;
$pastel-brown-rgb: 134, 102, 77;
$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);
}