#E7EDF3

CSS

:root {
  --first-snow: #e7edf3;
  --first-snow-rgb: 231 237 243;
  --first-snow-oklch: oklch(0.943 0.01 247.9);
}

.element {
  color: var(--first-snow);
  background-color: hsl(210 33% 93%);
  border-color: oklch(0.943 0.01 247.9);
}

Tailwind CSS v4

@theme {
  --color-first-snow: #e7edf3;
  --color-first-snow-50: #f3f5f8;
  --color-first-snow-100: #e5e8eb;
  --color-first-snow-200: #d1d5d8;
  --color-first-snow-300: #b3b8bd;
  --color-first-snow-400: #9a9fa4;
  --color-first-snow-500: #81878d;
  --color-first-snow-600: #6d7277;
  --color-first-snow-700: #575b5f;
  --color-first-snow-800: #404346;
  --color-first-snow-900: #2c2e30;
  --color-first-snow-950: #191b1d;
}

SCSS

$first-snow: #e7edf3;
$first-snow-rgb: 231, 237, 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);
}