#89A454

CSS

:root {
  --lime-it-or-leave-it: #89a454;
  --lime-it-or-leave-it-rgb: 137 164 84;
  --lime-it-or-leave-it-oklch: oklch(0.68 0.111 124.6);
}

.element {
  color: var(--lime-it-or-leave-it);
  background-color: hsl(80 32% 49%);
  border-color: oklch(0.68 0.111 124.6);
}

Tailwind CSS v4

@theme {
  --color-lime-it-or-leave-it: #89a454;
  --color-lime-it-or-leave-it-50: #edfcda;
  --color-lime-it-or-leave-it-100: #deefc8;
  --color-lime-it-or-leave-it-200: #c8deaa;
  --color-lime-it-or-leave-it-300: #a8c284;
  --color-lime-it-or-leave-it-400: #90aa5e;
  --color-lime-it-or-leave-it-500: #769238;
  --color-lime-it-or-leave-it-600: #647c31;
  --color-lime-it-or-leave-it-700: #506327;
  --color-lime-it-or-leave-it-800: #3b4819;
  --color-lime-it-or-leave-it-900: #293210;
  --color-lime-it-or-leave-it-950: #171e03;
}

SCSS

$lime-it-or-leave-it: #89a454;
$lime-it-or-leave-it-rgb: 137, 164, 84;
$lime-it-or-leave-it-light: mix(#fff, $lime-it-or-leave-it, 20%);
$lime-it-or-leave-it-dark: mix(#000, $lime-it-or-leave-it, 20%);

.element {
  color: $lime-it-or-leave-it;
  box-shadow: 0 0 0 2px rgba($lime-it-or-leave-it, 0.35);
}