#127CBA

CSS

:root {
  --honolulu-blue: #127cba;
  --honolulu-blue-rgb: 18 124 186;
  --honolulu-blue-oklch: oklch(0.562 0.129 242.4);
}

.element {
  color: var(--honolulu-blue);
  background-color: hsl(202 82% 40%);
  border-color: oklch(0.562 0.129 242.4);
}

Tailwind CSS v4

@theme {
  --color-honolulu-blue: #127cba;
  --color-honolulu-blue-50: #d7faff;
  --color-honolulu-blue-100: #c4edff;
  --color-honolulu-blue-200: #a5dbff;
  --color-honolulu-blue-300: #7cbff5;
  --color-honolulu-blue-400: #51a7e4;
  --color-honolulu-blue-500: #178ed4;
  --color-honolulu-blue-600: #1978b3;
  --color-honolulu-blue-700: #146090;
  --color-honolulu-blue-800: #07476a;
  --color-honolulu-blue-900: #05314b;
  --color-honolulu-blue-950: #001d31;
}

SCSS

$honolulu-blue: #127cba;
$honolulu-blue-rgb: 18, 124, 186;
$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);
}