#0081A0

CSS

:root {
  --ahoy-blue: #0081a0;
  --ahoy-blue-rgb: 0 129 160;
  --ahoy-blue-oklch: oklch(0.559 0.104 222.5);
}

.element {
  color: var(--ahoy-blue);
  background-color: hsl(192 100% 31%);
  border-color: oklch(0.559 0.104 222.5);
}

Tailwind CSS v4

@theme {
  --color-ahoy-blue: #0081a0;
  --color-ahoy-blue-50: #d7fcff;
  --color-ahoy-blue-100: #c4f0ff;
  --color-ahoy-blue-200: #a4def6;
  --color-ahoy-blue-300: #7ac3df;
  --color-ahoy-blue-400: #4eaccb;
  --color-ahoy-blue-500: #0595b7;
  --color-ahoy-blue-600: #107e9b;
  --color-ahoy-blue-700: #0e657c;
  --color-ahoy-blue-800: #054a5b;
  --color-ahoy-blue-900: #043440;
  --color-ahoy-blue-950: #001f29;
}

SCSS

$ahoy-blue: #0081a0;
$ahoy-blue-rgb: 0, 129, 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);
}