#6AA0C9

CSS

:root {
  --wandering-river: #6aa0c9;
  --wandering-river-rgb: 106 160 201;
  --wandering-river-oklch: oklch(0.684 0.083 242.2);
}

.element {
  color: var(--wandering-river);
  background-color: hsl(206 47% 60%);
  border-color: oklch(0.684 0.083 242.2);
}

Tailwind CSS v4

@theme {
  --color-wandering-river: #6aa0c9;
  --color-wandering-river-50: #e2f8ff;
  --color-wandering-river-100: #d1ecff;
  --color-wandering-river-200: #b7d9f6;
  --color-wandering-river-300: #93bde0;
  --color-wandering-river-400: #72a5cc;
  --color-wandering-river-500: #518db9;
  --color-wandering-river-600: #45779c;
  --color-wandering-river-700: #375f7d;
  --color-wandering-river-800: #26465c;
  --color-wandering-river-900: #193141;
  --color-wandering-river-950: #091d29;
}

SCSS

$wandering-river: #6aa0c9;
$wandering-river-rgb: 106, 160, 201;
$wandering-river-light: mix(#fff, $wandering-river, 20%);
$wandering-river-dark: mix(#000, $wandering-river, 20%);

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