#F4F9F8

CSS

:root {
  --white-porcelain: #f4f9f8;
  --white-porcelain-rgb: 244 249 248;
  --white-porcelain-oklch: oklch(0.978 0.005 183);
}

.element {
  color: var(--white-porcelain);
  background-color: hsl(168 29% 97%);
  border-color: oklch(0.978 0.005 183);
}

Tailwind CSS v4

@theme {
  --color-white-porcelain: #f4f9f8;
  --color-white-porcelain-50: #f3f6f5;
  --color-white-porcelain-100: #e6e8e8;
  --color-white-porcelain-200: #d2d5d4;
  --color-white-porcelain-300: #b4b8b8;
  --color-white-porcelain-400: #9b9f9f;
  --color-white-porcelain-500: #828786;
  --color-white-porcelain-600: #6e7372;
  --color-white-porcelain-700: #585c5b;
  --color-white-porcelain-800: #404342;
  --color-white-porcelain-900: #2c2e2e;
  --color-white-porcelain-950: #191b1b;
}

SCSS

$white-porcelain: #f4f9f8;
$white-porcelain-rgb: 244, 249, 248;
$white-porcelain-light: mix(#fff, $white-porcelain, 20%);
$white-porcelain-dark: mix(#000, $white-porcelain, 20%);

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