Yale Blue

CSS

:root {
  --yale-blue: #0f4d92;
  --yale-blue-rgb: 15 77 146;
  --yale-blue-oklch: oklch(0.424 0.129 255.1);
}

.element {
  color: var(--yale-blue);
  background-color: hsl(212 81% 32%);
  border-color: oklch(0.424 0.129 255.1);
}

Tailwind CSS v4

@theme {
  --color-yale-blue: #0f4d92;
  --color-yale-blue-50: #def7ff;
  --color-yale-blue-100: #cdeaff;
  --color-yale-blue-200: #b2d7ff;
  --color-yale-blue-300: #8dbaf9;
  --color-yale-blue-400: #68a1e9;
  --color-yale-blue-500: #4687d9;
  --color-yale-blue-600: #3c73b7;
  --color-yale-blue-700: #305c93;
  --color-yale-blue-800: #1e446d;
  --color-yale-blue-900: #142f4d;
  --color-yale-blue-950: #061b33;
}

SCSS

$yale-blue: #0f4d92;
$yale-blue-rgb: 15, 77, 146;
$yale-blue-light: mix(#fff, $yale-blue, 20%);
$yale-blue-dark: mix(#000, $yale-blue, 20%);

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