#0D80A2

CSS

:root {
  --ahoy-blue: #0d80a2;
  --ahoy-blue-rgb: 13 128 162;
  --ahoy-blue-oklch: oklch(0.559 0.104 225.5);
}

.element {
  color: var(--ahoy-blue);
  background-color: hsl(194 85% 34%);
  border-color: oklch(0.559 0.104 225.5);
}

Tailwind CSS v4

@theme {
  --color-ahoy-blue: #0d80a2;
  --color-ahoy-blue-50: #d7fcff;
  --color-ahoy-blue-100: #c5f0ff;
  --color-ahoy-blue-200: #a6def7;
  --color-ahoy-blue-300: #7cc2e1;
  --color-ahoy-blue-400: #51abcd;
  --color-ahoy-blue-500: #1494ba;
  --color-ahoy-blue-600: #187d9d;
  --color-ahoy-blue-700: #14647e;
  --color-ahoy-blue-800: #084a5d;
  --color-ahoy-blue-900: #063341;
  --color-ahoy-blue-950: #001f29;
}

SCSS

$ahoy-blue: #0d80a2;
$ahoy-blue-rgb: 13, 128, 162;
$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);
}