#8A6443

CSS

:root {
  --wild-horses: #8a6443;
  --wild-horses-rgb: 138 100 67;
  --wild-horses-oklch: oklch(0.535 0.068 61.5);
}

.element {
  color: var(--wild-horses);
  background-color: hsl(28 35% 40%);
  border-color: oklch(0.535 0.068 61.5);
}

Tailwind CSS v4

@theme {
  --color-wild-horses: #8a6443;
  --color-wild-horses-50: #fff2e2;
  --color-wild-horses-100: #f9e4d1;
  --color-wild-horses-200: #eacfb7;
  --color-wild-horses-300: #d1b194;
  --color-wild-horses-400: #bc9675;
  --color-wild-horses-500: #a77c56;
  --color-wild-horses-600: #8d694a;
  --color-wild-horses-700: #71543b;
  --color-wild-horses-800: #543d2a;
  --color-wild-horses-900: #3b2a1c;
  --color-wild-horses-950: #25170c;
}

SCSS

$wild-horses: #8a6443;
$wild-horses-rgb: 138, 100, 67;
$wild-horses-light: mix(#fff, $wild-horses, 20%);
$wild-horses-dark: mix(#000, $wild-horses, 20%);

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