#6A711D

CSS

:root {
  --topiary-green: #6a711d;
  --topiary-green-rgb: 106 113 29;
  --topiary-green-oklch: oklch(0.526 0.105 114.2);
}

.element {
  color: var(--topiary-green);
  background-color: hsl(65 59% 28%);
  border-color: oklch(0.526 0.105 114.2);
}

Tailwind CSS v4

@theme {
  --color-topiary-green: #6a711d;
  --color-topiary-green-50: #f3fad8;
  --color-topiary-green-100: #e5edc5;
  --color-topiary-green-200: #d1daa7;
  --color-topiary-green-300: #b4bf80;
  --color-topiary-green-400: #9da65a;
  --color-topiary-green-500: #858e31;
  --color-topiary-green-600: #71782c;
  --color-topiary-green-700: #5a6023;
  --color-topiary-green-800: #434616;
  --color-topiary-green-900: #2e300e;
  --color-topiary-green-950: #1b1c02;
}

SCSS

$topiary-green: #6a711d;
$topiary-green-rgb: 106, 113, 29;
$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);
}