Smokey Blue

CSS

:root {
  --smokey-blue: #647b84;
  --smokey-blue-rgb: 100 123 132;
  --smokey-blue-oklch: oklch(0.568 0.03 223.6);
}

.element {
  color: var(--smokey-blue);
  background-color: hsl(197 14% 45%);
  border-color: oklch(0.568 0.03 223.6);
}

Tailwind CSS v4

@theme {
  --color-smokey-blue: #647b84;
  --color-smokey-blue-50: #edf7fc;
  --color-smokey-blue-100: #deeaf0;
  --color-smokey-blue-200: #c7d7de;
  --color-smokey-blue-300: #a8bbc3;
  --color-smokey-blue-400: #8ca3ac;
  --color-smokey-blue-500: #718b95;
  --color-smokey-blue-600: #60767e;
  --color-smokey-blue-700: #4d5e65;
  --color-smokey-blue-800: #37454a;
  --color-smokey-blue-900: #263033;
  --color-smokey-blue-950: #141c1f;
}

SCSS

$smokey-blue: #647b84;
$smokey-blue-rgb: 100, 123, 132;
$smokey-blue-light: mix(#fff, $smokey-blue, 20%);
$smokey-blue-dark: mix(#000, $smokey-blue, 20%);

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