Pewter Blue

CSS

:root {
  --pewter-blue: #8ba8b7;
  --pewter-blue-rgb: 139 168 183;
  --pewter-blue-oklch: oklch(0.715 0.039 230.5);
}

.element {
  color: var(--pewter-blue);
  background-color: hsl(200 23% 63%);
  border-color: oklch(0.715 0.039 230.5);
}

Tailwind CSS v4

@theme {
  --color-pewter-blue: #8ba8b7;
  --color-pewter-blue-50: #ebf7ff;
  --color-pewter-blue-100: #dceaf3;
  --color-pewter-blue-200: #c5d8e2;
  --color-pewter-blue-300: #a5bbc8;
  --color-pewter-blue-400: #88a3b1;
  --color-pewter-blue-500: #6c8b9b;
  --color-pewter-blue-600: #5c7683;
  --color-pewter-blue-700: #495e69;
  --color-pewter-blue-800: #35454d;
  --color-pewter-blue-900: #243036;
  --color-pewter-blue-950: #131c21;
}

SCSS

$pewter-blue: #8ba8b7;
$pewter-blue-rgb: 139, 168, 183;
$pewter-blue-light: mix(#fff, $pewter-blue, 20%);
$pewter-blue-dark: mix(#000, $pewter-blue, 20%);

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