Heavy Black Green

CSS

:root {
  --heavy-black-green: #3a514d;
  --heavy-black-green-rgb: 58 81 77;
  --heavy-black-green-oklch: oklch(0.415 0.029 183);
}

.element {
  color: var(--heavy-black-green);
  background-color: hsl(170 17% 27%);
  border-color: oklch(0.415 0.029 183);
}

Tailwind CSS v4

@theme {
  --color-heavy-black-green: #3a514d;
  --color-heavy-black-green-50: #edf8f6;
  --color-heavy-black-green-100: #deebe9;
  --color-heavy-black-green-200: #c7d8d6;
  --color-heavy-black-green-300: #a8bcb9;
  --color-heavy-black-green-400: #8ca4a0;
  --color-heavy-black-green-500: #718d88;
  --color-heavy-black-green-600: #607773;
  --color-heavy-black-green-700: #4d5f5c;
  --color-heavy-black-green-800: #384643;
  --color-heavy-black-green-900: #26302e;
  --color-heavy-black-green-950: #141d1b;
}

SCSS

$heavy-black-green: #3a514d;
$heavy-black-green-rgb: 58, 81, 77;
$heavy-black-green-light: mix(#fff, $heavy-black-green, 20%);
$heavy-black-green-dark: mix(#000, $heavy-black-green, 20%);

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