#607E5C

CSS

:root {
  --emerald-city: #607e5c;
  --emerald-city-rgb: 96 126 92;
  --emerald-city-oklch: oklch(0.56 0.062 141.7);
}

.element {
  color: var(--emerald-city);
  background-color: hsl(113 16% 43%);
  border-color: oklch(0.56 0.062 141.7);
}

Tailwind CSS v4

@theme {
  --color-emerald-city: #607e5c;
  --color-emerald-city-50: #ebfaea;
  --color-emerald-city-100: #dceedb;
  --color-emerald-city-200: #c5dcc4;
  --color-emerald-city-300: #a5c0a4;
  --color-emerald-city-400: #8aa886;
  --color-emerald-city-500: #6f916b;
  --color-emerald-city-600: #5e7b5a;
  --color-emerald-city-700: #4b6248;
  --color-emerald-city-800: #374833;
  --color-emerald-city-900: #263223;
  --color-emerald-city-950: #141e12;
}

SCSS

$emerald-city: #607e5c;
$emerald-city-rgb: 96, 126, 92;
$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);
}