#3281AD

CSS

:root {
  --mediterranean-blue: #3281ad;
  --mediterranean-blue-rgb: 50 129 173;
  --mediterranean-blue-oklch: oklch(0.575 0.102 236.9);
}

.element {
  color: var(--mediterranean-blue);
  background-color: hsl(201 55% 44%);
  border-color: oklch(0.575 0.102 236.9);
}

Tailwind CSS v4

@theme {
  --color-mediterranean-blue: #3281ad;
  --color-mediterranean-blue-50: #dcfaff;
  --color-mediterranean-blue-100: #caedff;
  --color-mediterranean-blue-200: #addbfc;
  --color-mediterranean-blue-300: #86bfe6;
  --color-mediterranean-blue-400: #5fa7d3;
  --color-mediterranean-blue-500: #368fc1;
  --color-mediterranean-blue-600: #2f79a3;
  --color-mediterranean-blue-700: #266183;
  --color-mediterranean-blue-800: #174860;
  --color-mediterranean-blue-900: #0f3244;
  --color-mediterranean-blue-950: #021d2c;
}

SCSS

$mediterranean-blue: #3281ad;
$mediterranean-blue-rgb: 50, 129, 173;
$mediterranean-blue-light: mix(#fff, $mediterranean-blue, 20%);
$mediterranean-blue-dark: mix(#000, $mediterranean-blue, 20%);

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