#81A73F

CSS

:root {
  --lime-it-or-leave-it: #81a73f;
  --lime-it-or-leave-it-rgb: 129 167 63;
  --lime-it-or-leave-it-oklch: oklch(0.679 0.139 126.8);
}

.element {
  color: var(--lime-it-or-leave-it);
  background-color: hsl(82 45% 45%);
  border-color: oklch(0.679 0.139 126.8);
}

Tailwind CSS v4

@theme {
  --color-lime-it-or-leave-it: #81a73f;
  --color-lime-it-or-leave-it-50: #e9fed4;
  --color-lime-it-or-leave-it-100: #daf2c0;
  --color-lime-it-or-leave-it-200: #c2e0a1;
  --color-lime-it-or-leave-it-300: #a2c577;
  --color-lime-it-or-leave-it-400: #89ad4c;
  --color-lime-it-or-leave-it-500: #6e9615;
  --color-lime-it-or-leave-it-600: #5d7f16;
  --color-lime-it-or-leave-it-700: #4a6512;
  --color-lime-it-or-leave-it-800: #384a07;
  --color-lime-it-or-leave-it-900: #263305;
  --color-lime-it-or-leave-it-950: #141f00;
}

SCSS

$lime-it-or-leave-it: #81a73f;
$lime-it-or-leave-it-rgb: 129, 167, 63;
$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);
}