#F0FDE3

CSS

:root {
  --milk-foam: #f0fde3;
  --milk-foam-rgb: 240 253 227;
  --milk-foam-oklch: oklch(0.978 0.037 128.9);
}

.element {
  color: var(--milk-foam);
  background-color: hsl(90 87% 94%);
  border-color: oklch(0.978 0.037 128.9);
}

Tailwind CSS v4

@theme {
  --color-milk-foam: #f0fde3;
  --color-milk-foam-50: #f1f7ed;
  --color-milk-foam-100: #e4ebde;
  --color-milk-foam-200: #cfd8c8;
  --color-milk-foam-300: #b1bca8;
  --color-milk-foam-400: #98a38c;
  --color-milk-foam-500: #7f8b72;
  --color-milk-foam-600: #6b7660;
  --color-milk-foam-700: #565e4d;
  --color-milk-foam-800: #3f4537;
  --color-milk-foam-900: #2b3026;
  --color-milk-foam-950: #191c14;
}

SCSS

$milk-foam: #f0fde3;
$milk-foam-rgb: 240, 253, 227;
$milk-foam-light: mix(#fff, $milk-foam, 20%);
$milk-foam-dark: mix(#000, $milk-foam, 20%);

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