#0C819E

CSS

:root {
  --ahoy-blue: #0c819e;
  --ahoy-blue-rgb: 12 129 158;
  --ahoy-blue-oklch: oklch(0.56 0.101 221.5);
}

.element {
  color: var(--ahoy-blue);
  background-color: hsl(192 86% 33%);
  border-color: oklch(0.56 0.101 221.5);
}

Tailwind CSS v4

@theme {
  --color-ahoy-blue: #0c819e;
  --color-ahoy-blue-50: #d7fcff;
  --color-ahoy-blue-100: #c5f0ff;
  --color-ahoy-blue-200: #a5def4;
  --color-ahoy-blue-300: #7cc3dd;
  --color-ahoy-blue-400: #51acc9;
  --color-ahoy-blue-500: #1394b5;
  --color-ahoy-blue-600: #177e99;
  --color-ahoy-blue-700: #13657b;
  --color-ahoy-blue-800: #094a5a;
  --color-ahoy-blue-900: #06343f;
  --color-ahoy-blue-950: #001f28;
}

SCSS

$ahoy-blue: #0c819e;
$ahoy-blue-rgb: 12, 129, 158;
$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);
}