#4E4630

CSS

:root {
  --olive-leaf: #4e4630;
  --olive-leaf-rgb: 78 70 48;
  --olive-leaf-oklch: oklch(0.396 0.036 90.4);
}

.element {
  color: var(--olive-leaf);
  background-color: hsl(44 24% 25%);
  border-color: oklch(0.396 0.036 90.4);
}

Tailwind CSS v4

@theme {
  --color-olive-leaf: #4e4630;
  --color-olive-leaf-50: #f9f5ea;
  --color-olive-leaf-100: #ece8db;
  --color-olive-leaf-200: #d9d4c3;
  --color-olive-leaf-300: #beb7a3;
  --color-olive-leaf-400: #a69e87;
  --color-olive-leaf-500: #8f866b;
  --color-olive-leaf-600: #79715b;
  --color-olive-leaf-700: #615a48;
  --color-olive-leaf-800: #474234;
  --color-olive-leaf-900: #322d24;
  --color-olive-leaf-950: #1d1a12;
}

SCSS

$olive-leaf: #4e4630;
$olive-leaf-rgb: 78, 70, 48;
$olive-leaf-light: mix(#fff, $olive-leaf, 20%);
$olive-leaf-dark: mix(#000, $olive-leaf, 20%);

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