#90A33A

CSS

:root {
  --lime-it-or-leave-it: #90a33a;
  --lime-it-or-leave-it-rgb: 144 163 58;
  --lime-it-or-leave-it-oklch: oklch(0.68 0.131 118.8);
}

.element {
  color: var(--lime-it-or-leave-it);
  background-color: hsl(71 48% 43%);
  border-color: oklch(0.68 0.131 118.8);
}

Tailwind CSS v4

@theme {
  --color-lime-it-or-leave-it: #90a33a;
  --color-lime-it-or-leave-it-50: #effcd2;
  --color-lime-it-or-leave-it-100: #e1efbe;
  --color-lime-it-or-leave-it-200: #ccdd9e;
  --color-lime-it-or-leave-it-300: #aec274;
  --color-lime-it-or-leave-it-400: #96a948;
  --color-lime-it-or-leave-it-500: #7e9103;
  --color-lime-it-or-leave-it-600: #6a7b0d;
  --color-lime-it-or-leave-it-700: #55620c;
  --color-lime-it-or-leave-it-800: #404803;
  --color-lime-it-or-leave-it-900: #2c3203;
  --color-lime-it-or-leave-it-950: #191d00;
}

SCSS

$lime-it-or-leave-it: #90a33a;
$lime-it-or-leave-it-rgb: 144, 163, 58;
$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);
}