So Blue-Berry

CSS

:root {
  --so-blue-berry: #d4d8e3;
  --so-blue-berry-rgb: 212 216 227;
  --so-blue-berry-oklch: oklch(0.882 0.016 270);
}

.element {
  color: var(--so-blue-berry);
  background-color: hsl(224 21% 86%);
  border-color: oklch(0.882 0.016 270);
}

Tailwind CSS v4

@theme {
  --color-so-blue-berry: #d4d8e3;
  --color-so-blue-berry-50: #f3f5fa;
  --color-so-blue-berry-100: #e6e8ed;
  --color-so-blue-berry-200: #d2d4db;
  --color-so-blue-berry-300: #b4b7c0;
  --color-so-blue-berry-400: #9b9ea8;
  --color-so-blue-berry-500: #828691;
  --color-so-blue-berry-600: #6e717b;
  --color-so-blue-berry-700: #585b62;
  --color-so-blue-berry-800: #404248;
  --color-so-blue-berry-900: #2c2e32;
  --color-so-blue-berry-950: #191b1e;
}

SCSS

$so-blue-berry: #d4d8e3;
$so-blue-berry-rgb: 212, 216, 227;
$so-blue-berry-light: mix(#fff, $so-blue-berry, 20%);
$so-blue-berry-dark: mix(#000, $so-blue-berry, 20%);

.element {
  color: $so-blue-berry;
  box-shadow: 0 0 0 2px rgba($so-blue-berry, 0.35);
}