Oxford Blue

CSS

:root {
  --oxford-blue: #002147;
  --oxford-blue-rgb: 0 33 71;
  --oxford-blue-oklch: oklch(0.25 0.081 254.4);
}

.element {
  color: var(--oxford-blue);
  background-color: hsl(212 100% 14%);
  border-color: oklch(0.25 0.081 254.4);
}

Tailwind CSS v4

@theme {
  --color-oxford-blue: #002147;
  --color-oxford-blue-50: #e7f7ff;
  --color-oxford-blue-100: #d7eaff;
  --color-oxford-blue-200: #bed6f7;
  --color-oxford-blue-300: #9dbae1;
  --color-oxford-blue-400: #7ea1ce;
  --color-oxford-blue-500: #6089bb;
  --color-oxford-blue-600: #52749e;
  --color-oxford-blue-700: #415d7f;
  --color-oxford-blue-800: #2d445e;
  --color-oxford-blue-900: #1f2f42;
  --color-oxford-blue-950: #0e1b2a;
}

SCSS

$oxford-blue: #002147;
$oxford-blue-rgb: 0, 33, 71;
$oxford-blue-light: mix(#fff, $oxford-blue, 20%);
$oxford-blue-dark: mix(#000, $oxford-blue, 20%);

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