#CFE9F2

CSS

:root {
  --ice-cold: #cfe9f2;
  --ice-cold-rgb: 207 233 242;
  --ice-cold-oklch: oklch(0.918 0.03 220.6);
}

.element {
  color: var(--ice-cold);
  background-color: hsl(195 57% 88%);
  border-color: oklch(0.918 0.03 220.6);
}

Tailwind CSS v4

@theme {
  --color-ice-cold: #cfe9f2;
  --color-ice-cold-50: #ecf7fb;
  --color-ice-cold-100: #deeaef;
  --color-ice-cold-200: #c7d7de;
  --color-ice-cold-300: #a8bbc3;
  --color-ice-cold-400: #8ca3ab;
  --color-ice-cold-500: #718b94;
  --color-ice-cold-600: #60767d;
  --color-ice-cold-700: #4c5e64;
  --color-ice-cold-800: #374549;
  --color-ice-cold-900: #263033;
  --color-ice-cold-950: #141c1f;
}

SCSS

$ice-cold: #cfe9f2;
$ice-cold-rgb: 207, 233, 242;
$ice-cold-light: mix(#fff, $ice-cold, 20%);
$ice-cold-dark: mix(#000, $ice-cold, 20%);

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