#28A8CA

CSS

:root {
  --pacific-blue: #28a8ca;
  --pacific-blue-rgb: 40 168 202;
  --pacific-blue-oklch: oklch(0.68 0.115 220.8);
}

.element {
  color: var(--pacific-blue);
  background-color: hsl(193 67% 47%);
  border-color: oklch(0.68 0.115 220.8);
}

Tailwind CSS v4

@theme {
  --color-pacific-blue: #28a8ca;
  --color-pacific-blue-50: #d2fdff;
  --color-pacific-blue-100: #bff1ff;
  --color-pacific-blue-200: #9de0f8;
  --color-pacific-blue-300: #70c5e2;
  --color-pacific-blue-400: #3caece;
  --color-pacific-blue-500: #0096bb;
  --color-pacific-blue-600: #007f9e;
  --color-pacific-blue-700: #00667f;
  --color-pacific-blue-800: #004b5d;
  --color-pacific-blue-900: #003441;
  --color-pacific-blue-950: #001f2a;
}

SCSS

$pacific-blue: #28a8ca;
$pacific-blue-rgb: 40, 168, 202;
$pacific-blue-light: mix(#fff, $pacific-blue, 20%);
$pacific-blue-dark: mix(#000, $pacific-blue, 20%);

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