#F0ECE4

CSS

:root {
  --cow-s-milk: #f0ece4;
  --cow-s-milk-rgb: 240 236 228;
  --cow-s-milk-oklch: oklch(0.944 0.012 84.6);
}

.element {
  color: var(--cow-s-milk);
  background-color: hsl(40 29% 92%);
  border-color: oklch(0.944 0.012 84.6);
}

Tailwind CSS v4

@theme {
  --color-cow-s-milk: #f0ece4;
  --color-cow-s-milk-50: #f6f5f1;
  --color-cow-s-milk-100: #e9e8e4;
  --color-cow-s-milk-200: #d6d4cf;
  --color-cow-s-milk-300: #bab7b1;
  --color-cow-s-milk-400: #a19e97;
  --color-cow-s-milk-500: #8a867e;
  --color-cow-s-milk-600: #74716a;
  --color-cow-s-milk-700: #5d5a55;
  --color-cow-s-milk-800: #44423e;
  --color-cow-s-milk-900: #2f2e2b;
  --color-cow-s-milk-950: #1c1a18;
}

SCSS

$cow-s-milk: #f0ece4;
$cow-s-milk-rgb: 240, 236, 228;
$cow-s-milk-light: mix(#fff, $cow-s-milk, 20%);
$cow-s-milk-dark: mix(#000, $cow-s-milk, 20%);

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