Traditional Blue

CSS

:root {
  --traditional-blue: #1f648d;
  --traditional-blue-rgb: 31 100 141;
  --traditional-blue-oklch: oklch(0.481 0.094 239.6);
}

.element {
  color: var(--traditional-blue);
  background-color: hsl(202 64% 34%);
  border-color: oklch(0.481 0.094 239.6);
}

Tailwind CSS v4

@theme {
  --color-traditional-blue: #1f648d;
  --color-traditional-blue-50: #def9ff;
  --color-traditional-blue-100: #cdedff;
  --color-traditional-blue-200: #b1daf9;
  --color-traditional-blue-300: #8cbee4;
  --color-traditional-blue-400: #68a6d0;
  --color-traditional-blue-500: #448ebe;
  --color-traditional-blue-600: #3a78a0;
  --color-traditional-blue-700: #2e6081;
  --color-traditional-blue-800: #1f475f;
  --color-traditional-blue-900: #143143;
  --color-traditional-blue-950: #051d2b;
}

SCSS

$traditional-blue: #1f648d;
$traditional-blue-rgb: 31, 100, 141;
$traditional-blue-light: mix(#fff, $traditional-blue, 20%);
$traditional-blue-dark: mix(#000, $traditional-blue, 20%);

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