#8AA540

CSS

:root {
  --lime-it-or-leave-it: #8aa540;
  --lime-it-or-leave-it-rgb: 138 165 64;
  --lime-it-or-leave-it-oklch: oklch(0.68 0.131 122.6);
}

.element {
  color: var(--lime-it-or-leave-it);
  background-color: hsl(76 44% 45%);
  border-color: oklch(0.68 0.131 122.6);
}

Tailwind CSS v4

@theme {
  --color-lime-it-or-leave-it: #8aa540;
  --color-lime-it-or-leave-it-50: #edfcd4;
  --color-lime-it-or-leave-it-100: #def0c0;
  --color-lime-it-or-leave-it-200: #c8dfa1;
  --color-lime-it-or-leave-it-300: #a8c377;
  --color-lime-it-or-leave-it-400: #91ab4d;
  --color-lime-it-or-leave-it-500: #779316;
  --color-lime-it-or-leave-it-600: #657c17;
  --color-lime-it-or-leave-it-700: #506413;
  --color-lime-it-or-leave-it-800: #3c4908;
  --color-lime-it-or-leave-it-900: #293206;
  --color-lime-it-or-leave-it-950: #171e00;
}

SCSS

$lime-it-or-leave-it: #8aa540;
$lime-it-or-leave-it-rgb: 138, 165, 64;
$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);
}