Foggy Blue

CSS

:root {
  --foggy-blue: #99aebb;
  --foggy-blue-rgb: 153 174 187;
  --foggy-blue-oklch: oklch(0.739 0.03 235);
}

.element {
  color: var(--foggy-blue);
  background-color: hsl(203 20% 67%);
  border-color: oklch(0.739 0.03 235);
}

Tailwind CSS v4

@theme {
  --color-foggy-blue: #99aebb;
  --color-foggy-blue-50: #eef7fd;
  --color-foggy-blue-100: #dfeaf1;
  --color-foggy-blue-200: #c9d6e0;
  --color-foggy-blue-300: #aabac5;
  --color-foggy-blue-400: #8ea2ae;
  --color-foggy-blue-500: #738a98;
  --color-foggy-blue-600: #627580;
  --color-foggy-blue-700: #4e5d67;
  --color-foggy-blue-800: #38444b;
  --color-foggy-blue-900: #272f34;
  --color-foggy-blue-950: #151c20;
}

SCSS

$foggy-blue: #99aebb;
$foggy-blue-rgb: 153, 174, 187;
$foggy-blue-light: mix(#fff, $foggy-blue, 20%);
$foggy-blue-dark: mix(#000, $foggy-blue, 20%);

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