#E5EBF3

CSS

:root {
  --first-snow: #e5ebf3;
  --first-snow-rgb: 229 235 243;
  --first-snow-oklch: oklch(0.938 0.013 255.5);
}

.element {
  color: var(--first-snow);
  background-color: hsl(214 37% 93%);
  border-color: oklch(0.938 0.013 255.5);
}

Tailwind CSS v4

@theme {
  --color-first-snow: #e5ebf3;
  --color-first-snow-50: #f3f5f9;
  --color-first-snow-100: #e5e8ec;
  --color-first-snow-200: #d1d4da;
  --color-first-snow-300: #b3b8be;
  --color-first-snow-400: #9a9fa6;
  --color-first-snow-500: #81878f;
  --color-first-snow-600: #6d7279;
  --color-first-snow-700: #575b61;
  --color-first-snow-800: #3f4347;
  --color-first-snow-900: #2c2e31;
  --color-first-snow-950: #191b1d;
}

SCSS

$first-snow: #e5ebf3;
$first-snow-rgb: 229, 235, 243;
$first-snow-light: mix(#fff, $first-snow, 20%);
$first-snow-dark: mix(#000, $first-snow, 20%);

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