#2A7CB1

CSS

:root {
  --honolulu-blue: #2a7cb1;
  --honolulu-blue-rgb: 42 124 177;
  --honolulu-blue-oklch: oklch(0.562 0.113 241.6);
}

.element {
  color: var(--honolulu-blue);
  background-color: hsl(204 62% 43%);
  border-color: oklch(0.562 0.113 241.6);
}

Tailwind CSS v4

@theme {
  --color-honolulu-blue: #2a7cb1;
  --color-honolulu-blue-50: #dbfaff;
  --color-honolulu-blue-100: #c9edff;
  --color-honolulu-blue-200: #abdaff;
  --color-honolulu-blue-300: #84beed;
  --color-honolulu-blue-400: #5da6db;
  --color-honolulu-blue-500: #328eca;
  --color-honolulu-blue-600: #2c78aa;
  --color-honolulu-blue-700: #236089;
  --color-honolulu-blue-800: #154765;
  --color-honolulu-blue-900: #0d3147;
  --color-honolulu-blue-950: #011d2e;
}

SCSS

$honolulu-blue: #2a7cb1;
$honolulu-blue-rgb: 42, 124, 177;
$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);
}