#318815

CSS

:root {
  --green-bell-pepper: #318815;
  --green-bell-pepper-rgb: 49 136 21;
  --green-bell-pepper-oklch: oklch(0.553 0.167 139.8);
}

.element {
  color: var(--green-bell-pepper);
  background-color: hsl(105 73% 31%);
  border-color: oklch(0.553 0.167 139.8);
}

Tailwind CSS v4

@theme {
  --color-green-bell-pepper: #318815;
  --color-green-bell-pepper-50: #dbffd6;
  --color-green-bell-pepper-100: #c9f7c3;
  --color-green-bell-pepper-200: #ace7a4;
  --color-green-bell-pepper-300: #84cd7c;
  --color-green-bell-pepper-400: #64b551;
  --color-green-bell-pepper-500: #3d9f1f;
  --color-green-bell-pepper-600: #35861e;
  --color-green-bell-pepper-700: #2a6c18;
  --color-green-bell-pepper-800: #214f0a;
  --color-green-bell-pepper-900: #163707;
  --color-green-bell-pepper-950: #072200;
}

SCSS

$green-bell-pepper: #318815;
$green-bell-pepper-rgb: 49, 136, 21;
$green-bell-pepper-light: mix(#fff, $green-bell-pepper, 20%);
$green-bell-pepper-dark: mix(#000, $green-bell-pepper, 20%);

.element {
  color: $green-bell-pepper;
  box-shadow: 0 0 0 2px rgba($green-bell-pepper, 0.35);
}