#648F53

CSS

:root {
  --victorian-garden: #648f53;
  --victorian-garden-rgb: 100 143 83;
  --victorian-garden-oklch: oklch(0.603 0.099 137.3);
}

.element {
  color: var(--victorian-garden);
  background-color: hsl(103 27% 44%);
  border-color: oklch(0.603 0.099 137.3);
}

Tailwind CSS v4

@theme {
  --color-victorian-garden: #648f53;
  --color-victorian-garden-50: #e7fde2;
  --color-victorian-garden-100: #d8f1d1;
  --color-victorian-garden-200: #bfdfb7;
  --color-victorian-garden-300: #9ec494;
  --color-victorian-garden-400: #82ac72;
  --color-victorian-garden-500: #669552;
  --color-victorian-garden-600: #567e46;
  --color-victorian-garden-700: #456538;
  --color-victorian-garden-800: #334a26;
  --color-victorian-garden-900: #233319;
  --color-victorian-garden-950: #121f0a;
}

SCSS

$victorian-garden: #648f53;
$victorian-garden-rgb: 100, 143, 83;
$victorian-garden-light: mix(#fff, $victorian-garden, 20%);
$victorian-garden-dark: mix(#000, $victorian-garden, 20%);

.element {
  color: $victorian-garden;
  box-shadow: 0 0 0 2px rgba($victorian-garden, 0.35);
}