Girls in Blue

CSS

:root {
  --girls-in-blue: #5a82ac;
  --girls-in-blue-rgb: 90 130 172;
  --girls-in-blue-oklch: oklch(0.594 0.079 250.4);
}

.element {
  color: var(--girls-in-blue);
  background-color: hsl(211 33% 51%);
  border-color: oklch(0.594 0.079 250.4);
}

Tailwind CSS v4

@theme {
  --color-girls-in-blue: #5a82ac;
  --color-girls-in-blue-50: #e6f7ff;
  --color-girls-in-blue-100: #d6eaff;
  --color-girls-in-blue-200: #bdd7f6;
  --color-girls-in-blue-300: #9bbbdf;
  --color-girls-in-blue-400: #7ba2cc;
  --color-girls-in-blue-500: #5d8ab9;
  --color-girls-in-blue-600: #4f759c;
  --color-girls-in-blue-700: #3f5d7d;
  --color-girls-in-blue-800: #2c455c;
  --color-girls-in-blue-900: #1e2f41;
  --color-girls-in-blue-950: #0e1c29;
}

SCSS

$girls-in-blue: #5a82ac;
$girls-in-blue-rgb: 90, 130, 172;
$girls-in-blue-light: mix(#fff, $girls-in-blue, 20%);
$girls-in-blue-dark: mix(#000, $girls-in-blue, 20%);

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