#DDF9F8

CSS

:root {
  --cold-canada: #ddf9f8;
  --cold-canada-rgb: 221 249 248;
  --cold-canada-oklch: oklch(0.962 0.029 194.1);
}

.element {
  color: var(--cold-canada);
  background-color: hsl(178 70% 92%);
  border-color: oklch(0.962 0.029 194.1);
}

Tailwind CSS v4

@theme {
  --color-cold-canada: #ddf9f8;
  --color-cold-canada-50: #ecf8f8;
  --color-cold-canada-100: #ddebeb;
  --color-cold-canada-200: #c7d8d8;
  --color-cold-canada-300: #a7bcbc;
  --color-cold-canada-400: #8ba4a3;
  --color-cold-canada-500: #708d8c;
  --color-cold-canada-600: #5f7776;
  --color-cold-canada-700: #4c5f5f;
  --color-cold-canada-800: #374645;
  --color-cold-canada-900: #263030;
  --color-cold-canada-950: #141c1c;
}

SCSS

$cold-canada: #ddf9f8;
$cold-canada-rgb: 221, 249, 248;
$cold-canada-light: mix(#fff, $cold-canada, 20%);
$cold-canada-dark: mix(#000, $cold-canada, 20%);

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