#1481C8

CSS

:root {
  --honolulu-blue: #1481c8;
  --honolulu-blue-rgb: 20 129 200;
  --honolulu-blue-oklch: oklch(0.583 0.141 245);
}

.element {
  color: var(--honolulu-blue);
  background-color: hsl(204 82% 43%);
  border-color: oklch(0.583 0.141 245);
}

Tailwind CSS v4

@theme {
  --color-honolulu-blue: #1481c8;
  --color-honolulu-blue-50: #d6faff;
  --color-honolulu-blue-100: #c3edff;
  --color-honolulu-blue-200: #a3daff;
  --color-honolulu-blue-300: #7abefc;
  --color-honolulu-blue-400: #4ca6eb;
  --color-honolulu-blue-500: #068cdc;
  --color-honolulu-blue-600: #1077ba;
  --color-honolulu-blue-700: #0e5f95;
  --color-honolulu-blue-800: #01466f;
  --color-honolulu-blue-900: #02314e;
  --color-honolulu-blue-950: #001d34;
}

SCSS

$honolulu-blue: #1481c8;
$honolulu-blue-rgb: 20, 129, 200;
$honolulu-blue-light: mix(#fff, $honolulu-blue, 20%);
$honolulu-blue-dark: mix(#000, $honolulu-blue, 20%);

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