#DDEBE5

CSS

:root {
  --porcelain-mint: #ddebe5;
  --porcelain-mint-rgb: 221 235 229;
  --porcelain-mint-oklch: oklch(0.928 0.017 168.5);
}

.element {
  color: var(--porcelain-mint);
  background-color: hsl(154 26% 89%);
  border-color: oklch(0.928 0.017 168.5);
}

Tailwind CSS v4

@theme {
  --color-porcelain-mint: #ddebe5;
  --color-porcelain-mint-50: #f1f7f4;
  --color-porcelain-mint-100: #e3eae7;
  --color-porcelain-mint-200: #ced7d3;
  --color-porcelain-mint-300: #afbab6;
  --color-porcelain-mint-400: #95a29c;
  --color-porcelain-mint-500: #7c8a84;
  --color-porcelain-mint-600: #697570;
  --color-porcelain-mint-700: #545d59;
  --color-porcelain-mint-800: #3d4441;
  --color-porcelain-mint-900: #2a2f2d;
  --color-porcelain-mint-950: #181c1a;
}

SCSS

$porcelain-mint: #ddebe5;
$porcelain-mint-rgb: 221, 235, 229;
$porcelain-mint-light: mix(#fff, $porcelain-mint, 20%);
$porcelain-mint-dark: mix(#000, $porcelain-mint, 20%);

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