#057DBC

CSS

:root {
  --honolulu-blue: #057dbc;
  --honolulu-blue-rgb: 5 125 188;
  --honolulu-blue-oklch: oklch(0.565 0.132 241.8);
}

.element {
  color: var(--honolulu-blue);
  background-color: hsl(201 95% 38%);
  border-color: oklch(0.565 0.132 241.8);
}

Tailwind CSS v4

@theme {
  --color-honolulu-blue: #057dbc;
  --color-honolulu-blue-50: #d6faff;
  --color-honolulu-blue-100: #c3eeff;
  --color-honolulu-blue-200: #a3dbff;
  --color-honolulu-blue-300: #7abff6;
  --color-honolulu-blue-400: #4da7e5;
  --color-honolulu-blue-500: #058ed5;
  --color-honolulu-blue-600: #0f78b4;
  --color-honolulu-blue-700: #0e6090;
  --color-honolulu-blue-800: #01476b;
  --color-honolulu-blue-900: #03314b;
  --color-honolulu-blue-950: #001d32;
}

SCSS

$honolulu-blue: #057dbc;
$honolulu-blue-rgb: 5, 125, 188;
$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);
}