Havelock Blue

CSS

:root {
  --havelock-blue: #5784c1;
  --havelock-blue-rgb: 87 132 193;
  --havelock-blue-oklch: oklch(0.607 0.106 256.3);
}

.element {
  color: var(--havelock-blue);
  background-color: hsl(215 46% 55%);
  border-color: oklch(0.607 0.106 256.3);
}

Tailwind CSS v4

@theme {
  --color-havelock-blue: #5784c1;
  --color-havelock-blue-50: #e3f7ff;
  --color-havelock-blue-100: #d3eaff;
  --color-havelock-blue-200: #b9d6ff;
  --color-havelock-blue-300: #96b9ee;
  --color-havelock-blue-400: #75a1dc;
  --color-havelock-blue-500: #5688cb;
  --color-havelock-blue-600: #4973ab;
  --color-havelock-blue-700: #3a5c8a;
  --color-havelock-blue-800: #274466;
  --color-havelock-blue-900: #1a2f48;
  --color-havelock-blue-950: #0b1b2f;
}

SCSS

$havelock-blue: #5784c1;
$havelock-blue-rgb: 87, 132, 193;
$havelock-blue-light: mix(#fff, $havelock-blue, 20%);
$havelock-blue-dark: mix(#000, $havelock-blue, 20%);

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