#137DBB

CSS

:root {
  --honolulu-blue: #137dbb;
  --honolulu-blue-rgb: 19 125 187;
  --honolulu-blue-oklch: oklch(0.566 0.129 242.3);
}

.element {
  color: var(--honolulu-blue);
  background-color: hsl(202 82% 40%);
  border-color: oklch(0.566 0.129 242.3);
}

Tailwind CSS v4

@theme {
  --color-honolulu-blue: #137dbb;
  --color-honolulu-blue-50: #d7faff;
  --color-honolulu-blue-100: #c4eeff;
  --color-honolulu-blue-200: #a5dbff;
  --color-honolulu-blue-300: #7cbff5;
  --color-honolulu-blue-400: #50a7e4;
  --color-honolulu-blue-500: #168ed4;
  --color-honolulu-blue-600: #1878b3;
  --color-honolulu-blue-700: #14608f;
  --color-honolulu-blue-800: #06476a;
  --color-honolulu-blue-900: #05314b;
  --color-honolulu-blue-950: #001d31;
}

SCSS

$honolulu-blue: #137dbb;
$honolulu-blue-rgb: 19, 125, 187;
$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);
}