#057EB6

CSS

:root {
  --mediterranean-blue: #057eb6;
  --mediterranean-blue-rgb: 5 126 182;
  --mediterranean-blue-oklch: oklch(0.564 0.125 238.5);
}

.element {
  color: var(--mediterranean-blue);
  background-color: hsl(199 95% 37%);
  border-color: oklch(0.564 0.125 238.5);
}

Tailwind CSS v4

@theme {
  --color-mediterranean-blue: #057eb6;
  --color-mediterranean-blue-50: #d6fbff;
  --color-mediterranean-blue-100: #c3eeff;
  --color-mediterranean-blue-200: #a4dcff;
  --color-mediterranean-blue-300: #7ac0f1;
  --color-mediterranean-blue-400: #4da8e0;
  --color-mediterranean-blue-500: #0690cf;
  --color-mediterranean-blue-600: #107aae;
  --color-mediterranean-blue-700: #0e618c;
  --color-mediterranean-blue-800: #024868;
  --color-mediterranean-blue-900: #033249;
  --color-mediterranean-blue-950: #001e30;
}

SCSS

$mediterranean-blue: #057eb6;
$mediterranean-blue-rgb: 5, 126, 182;
$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);
}