#1A80A1

CSS

:root {
  --ahoy-blue: #1a80a1;
  --ahoy-blue-rgb: 26 128 161;
  --ahoy-blue-oklch: oklch(0.56 0.1 225.8);
}

.element {
  color: var(--ahoy-blue);
  background-color: hsl(195 72% 37%);
  border-color: oklch(0.56 0.1 225.8);
}

Tailwind CSS v4

@theme {
  --color-ahoy-blue: #1a80a1;
  --color-ahoy-blue-50: #d9fcff;
  --color-ahoy-blue-100: #c6efff;
  --color-ahoy-blue-200: #a8ddf6;
  --color-ahoy-blue-300: #7fc2e0;
  --color-ahoy-blue-400: #56abcb;
  --color-ahoy-blue-500: #2193b8;
  --color-ahoy-blue-600: #207c9c;
  --color-ahoy-blue-700: #1a647d;
  --color-ahoy-blue-800: #0e495c;
  --color-ahoy-blue-900: #093340;
  --color-ahoy-blue-950: #001f29;
}

SCSS

$ahoy-blue: #1a80a1;
$ahoy-blue-rgb: 26, 128, 161;
$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);
}