#1C80A0

CSS

:root {
  --ahoy-blue: #1c80a0;
  --ahoy-blue-rgb: 28 128 160;
  --ahoy-blue-oklch: oklch(0.56 0.099 225.2);
}

.element {
  color: var(--ahoy-blue);
  background-color: hsl(195 70% 37%);
  border-color: oklch(0.56 0.099 225.2);
}

Tailwind CSS v4

@theme {
  --color-ahoy-blue: #1c80a0;
  --color-ahoy-blue-50: #d9fcff;
  --color-ahoy-blue-100: #c6efff;
  --color-ahoy-blue-200: #a8ddf5;
  --color-ahoy-blue-300: #80c2df;
  --color-ahoy-blue-400: #56abca;
  --color-ahoy-blue-500: #2393b7;
  --color-ahoy-blue-600: #217d9b;
  --color-ahoy-blue-700: #1b647c;
  --color-ahoy-blue-800: #0f4a5b;
  --color-ahoy-blue-900: #0a3340;
  --color-ahoy-blue-950: #001f29;
}

SCSS

$ahoy-blue: #1c80a0;
$ahoy-blue-rgb: 28, 128, 160;
$ahoy-blue-light: mix(#fff, $ahoy-blue, 20%);
$ahoy-blue-dark: mix(#000, $ahoy-blue, 20%);

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