Country Blue

CSS

:root {
  --country-blue: #717f9b;
  --country-blue-rgb: 113 127 155;
  --country-blue-oklch: oklch(0.595 0.046 264.1);
}

.element {
  color: var(--country-blue);
  background-color: hsl(220 17% 53%);
  border-color: oklch(0.595 0.046 264.1);
}

Tailwind CSS v4

@theme {
  --color-country-blue: #717f9b;
  --color-country-blue-50: #eff5ff;
  --color-country-blue-100: #e1e8f8;
  --color-country-blue-200: #cbd4e9;
  --color-country-blue-300: #acb7d0;
  --color-country-blue-400: #919fba;
  --color-country-blue-500: #7786a5;
  --color-country-blue-600: #65728c;
  --color-country-blue-700: #505b70;
  --color-country-blue-800: #3a4353;
  --color-country-blue-900: #282e3a;
  --color-country-blue-950: #161b24;
}

SCSS

$country-blue: #717f9b;
$country-blue-rgb: 113, 127, 155;
$country-blue-light: mix(#fff, $country-blue, 20%);
$country-blue-dark: mix(#000, $country-blue, 20%);

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