#8AA451

CSS

:root {
  --lime-it-or-leave-it: #8aa451;
  --lime-it-or-leave-it-rgb: 138 164 81;
  --lime-it-or-leave-it-oklch: oklch(0.68 0.114 123.8);
}

.element {
  color: var(--lime-it-or-leave-it);
  background-color: hsl(79 34% 48%);
  border-color: oklch(0.68 0.114 123.8);
}

Tailwind CSS v4

@theme {
  --color-lime-it-or-leave-it: #8aa451;
  --color-lime-it-or-leave-it-50: #edfcd9;
  --color-lime-it-or-leave-it-100: #deefc6;
  --color-lime-it-or-leave-it-200: #c8dea9;
  --color-lime-it-or-leave-it-300: #a9c282;
  --color-lime-it-or-leave-it-400: #91aa5c;
  --color-lime-it-or-leave-it-500: #779234;
  --color-lime-it-or-leave-it-600: #657c2d;
  --color-lime-it-or-leave-it-700: #506324;
  --color-lime-it-or-leave-it-800: #3c4816;
  --color-lime-it-or-leave-it-900: #29320e;
  --color-lime-it-or-leave-it-950: #171e02;
}

SCSS

$lime-it-or-leave-it: #8aa451;
$lime-it-or-leave-it-rgb: 138, 164, 81;
$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);
}