#5F7405

CSS

:root {
  --topiary-green: #5f7405;
  --topiary-green-rgb: 95 116 5;
  --topiary-green-oklch: oklch(0.523 0.124 121.5);
}

.element {
  color: var(--topiary-green);
  background-color: hsl(71 92% 24%);
  border-color: oklch(0.523 0.124 121.5);
}

Tailwind CSS v4

@theme {
  --color-topiary-green: #5f7405;
  --color-topiary-green-50: #eefcd5;
  --color-topiary-green-100: #dfefc2;
  --color-topiary-green-200: #c9dea3;
  --color-topiary-green-300: #abc27a;
  --color-topiary-green-400: #93aa51;
  --color-topiary-green-500: #7a9221;
  --color-topiary-green-600: #677c1f;
  --color-topiary-green-700: #526319;
  --color-topiary-green-800: #3e480d;
  --color-topiary-green-900: #2a3208;
  --color-topiary-green-950: #181e00;
}

SCSS

$topiary-green: #5f7405;
$topiary-green-rgb: 95, 116, 5;
$topiary-green-light: mix(#fff, $topiary-green, 20%);
$topiary-green-dark: mix(#000, $topiary-green, 20%);

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