#858463

CSS

:root {
  --wilderness: #858463;
  --wilderness-rgb: 133 132 99;
  --wilderness-oklch: oklch(0.605 0.047 106.3);
}

.element {
  color: var(--wilderness);
  background-color: hsl(58 15% 45%);
  border-color: oklch(0.605 0.047 106.3);
}

Tailwind CSS v4

@theme {
  --color-wilderness: #858463;
  --color-wilderness-50: #f6f6e7;
  --color-wilderness-100: #e9e9d8;
  --color-wilderness-200: #d6d6bf;
  --color-wilderness-300: #b9ba9e;
  --color-wilderness-400: #a2a180;
  --color-wilderness-500: #8a8964;
  --color-wilderness-600: #757455;
  --color-wilderness-700: #5d5c44;
  --color-wilderness-800: #454330;
  --color-wilderness-900: #302f21;
  --color-wilderness-950: #1c1b10;
}

SCSS

$wilderness: #858463;
$wilderness-rgb: 133, 132, 99;
$wilderness-light: mix(#fff, $wilderness, 20%);
$wilderness-dark: mix(#000, $wilderness, 20%);

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