Smoky Blue

CSS

:root {
  --smoky-blue: #7196a6;
  --smoky-blue-rgb: 113 150 166;
  --smoky-blue-oklch: oklch(0.651 0.047 226.4);
}

.element {
  color: var(--smoky-blue);
  background-color: hsl(198 23% 55%);
  border-color: oklch(0.651 0.047 226.4);
}

Tailwind CSS v4

@theme {
  --color-smoky-blue: #7196a6;
  --color-smoky-blue-50: #e8f8ff;
  --color-smoky-blue-100: #d8ebf5;
  --color-smoky-blue-200: #c0d9e4;
  --color-smoky-blue-300: #9fbdcb;
  --color-smoky-blue-400: #81a5b4;
  --color-smoky-blue-500: #648d9e;
  --color-smoky-blue-600: #557786;
  --color-smoky-blue-700: #445f6b;
  --color-smoky-blue-800: #30464f;
  --color-smoky-blue-900: #213137;
  --color-smoky-blue-950: #101d22;
}

SCSS

$smoky-blue: #7196a6;
$smoky-blue-rgb: 113, 150, 166;
$smoky-blue-light: mix(#fff, $smoky-blue, 20%);
$smoky-blue-dark: mix(#000, $smoky-blue, 20%);

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