#6B7B62

CSS

:root {
  --emerald-city: #6b7b62;
  --emerald-city-rgb: 107 123 98;
  --emerald-city-oklch: oklch(0.562 0.042 134.3);
}

.element {
  color: var(--emerald-city);
  background-color: hsl(98 11% 43%);
  border-color: oklch(0.562 0.042 134.3);
}

Tailwind CSS v4

@theme {
  --color-emerald-city: #6b7b62;
  --color-emerald-city-50: #f0f8ec;
  --color-emerald-city-100: #e2ebde;
  --color-emerald-city-200: #ccd9c7;
  --color-emerald-city-300: #aebda8;
  --color-emerald-city-400: #94a48b;
  --color-emerald-city-500: #7b8d71;
  --color-emerald-city-600: #68775f;
  --color-emerald-city-700: #535f4c;
  --color-emerald-city-800: #3d4637;
  --color-emerald-city-900: #2a3025;
  --color-emerald-city-950: #171c14;
}

SCSS

$emerald-city: #6b7b62;
$emerald-city-rgb: 107, 123, 98;
$emerald-city-light: mix(#fff, $emerald-city, 20%);
$emerald-city-dark: mix(#000, $emerald-city, 20%);

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