#9FBBE3

CSS

:root {
  --sail-into-the-horizon: #9fbbe3;
  --sail-into-the-horizon-rgb: 159 187 227;
  --sail-into-the-horizon-oklch: oklch(0.785 0.065 257.3);
}

.element {
  color: var(--sail-into-the-horizon);
  background-color: hsl(215 55% 76%);
  border-color: oklch(0.785 0.065 257.3);
}

Tailwind CSS v4

@theme {
  --color-sail-into-the-horizon: #9fbbe3;
  --color-sail-into-the-horizon-50: #eaf6ff;
  --color-sail-into-the-horizon-100: #dbe9fe;
  --color-sail-into-the-horizon-200: #c4d5f1;
  --color-sail-into-the-horizon-300: #a4b9d9;
  --color-sail-into-the-horizon-400: #86a0c5;
  --color-sail-into-the-horizon-500: #6b88b1;
  --color-sail-into-the-horizon-600: #5b7396;
  --color-sail-into-the-horizon-700: #485c78;
  --color-sail-into-the-horizon-800: #334359;
  --color-sail-into-the-horizon-900: #232f3e;
  --color-sail-into-the-horizon-950: #121b27;
}

SCSS

$sail-into-the-horizon: #9fbbe3;
$sail-into-the-horizon-rgb: 159, 187, 227;
$sail-into-the-horizon-light: mix(#fff, $sail-into-the-horizon, 20%);
$sail-into-the-horizon-dark: mix(#000, $sail-into-the-horizon, 20%);

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