Blue Horizon

CSS

:root {
  --blue-horizon: #289dbe;
  --blue-horizon-rgb: 40 157 190;
  --blue-horizon-oklch: oklch(0.648 0.109 221.8);
}

.element {
  color: var(--blue-horizon);
  background-color: hsl(193 65% 45%);
  border-color: oklch(0.648 0.109 221.8);
}

Tailwind CSS v4

@theme {
  --color-blue-horizon: #289dbe;
  --color-blue-horizon-50: #d5fdff;
  --color-blue-horizon-100: #c1f1ff;
  --color-blue-horizon-200: #a1dff7;
  --color-blue-horizon-300: #75c4e1;
  --color-blue-horizon-400: #46adcc;
  --color-blue-horizon-500: #0095ba;
  --color-blue-horizon-600: #007e9d;
  --color-blue-horizon-700: #00657e;
  --color-blue-horizon-800: #004b5c;
  --color-blue-horizon-900: #003441;
  --color-blue-horizon-950: #001f29;
}

SCSS

$blue-horizon: #289dbe;
$blue-horizon-rgb: 40, 157, 190;
$blue-horizon-light: mix(#fff, $blue-horizon, 20%);
$blue-horizon-dark: mix(#000, $blue-horizon, 20%);

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