#DDEAD5

CSS

:root {
  --ghost-lichen: #ddead5;
  --ghost-lichen-rgb: 221 234 213;
  --ghost-lichen-oklch: oklch(0.922 0.031 133.3);
}

.element {
  color: var(--ghost-lichen);
  background-color: hsl(97 33% 88%);
  border-color: oklch(0.922 0.031 133.3);
}

Tailwind CSS v4

@theme {
  --color-ghost-lichen: #ddead5;
  --color-ghost-lichen-50: #f1f7ee;
  --color-ghost-lichen-100: #e3eae0;
  --color-ghost-lichen-200: #cfd7ca;
  --color-ghost-lichen-300: #b1bbab;
  --color-ghost-lichen-400: #97a390;
  --color-ghost-lichen-500: #7e8b76;
  --color-ghost-lichen-600: #6b7664;
  --color-ghost-lichen-700: #555e50;
  --color-ghost-lichen-800: #3e453a;
  --color-ghost-lichen-900: #2b3027;
  --color-ghost-lichen-950: #181c16;
}

SCSS

$ghost-lichen: #ddead5;
$ghost-lichen-rgb: 221, 234, 213;
$ghost-lichen-light: mix(#fff, $ghost-lichen, 20%);
$ghost-lichen-dark: mix(#000, $ghost-lichen, 20%);

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