Blue-Eyed Boy

CSS

:root {
  --blue-eyed-boy: #2277cc;
  --blue-eyed-boy-rgb: 34 119 204;
  --blue-eyed-boy-oklch: oklch(0.565 0.153 252.6);
}

.element {
  color: var(--blue-eyed-boy);
  background-color: hsl(210 71% 47%);
  border-color: oklch(0.565 0.153 252.6);
}

Tailwind CSS v4

@theme {
  --color-blue-eyed-boy: #2277cc;
  --color-blue-eyed-boy-50: #d8f8ff;
  --color-blue-eyed-boy-100: #c6ebff;
  --color-blue-eyed-boy-200: #a8d8ff;
  --color-blue-eyed-boy-300: #80bbff;
  --color-blue-eyed-boy-400: #56a2f6;
  --color-blue-eyed-boy-500: #2888e7;
  --color-blue-eyed-boy-600: #2473c3;
  --color-blue-eyed-boy-700: #1d5c9d;
  --color-blue-eyed-boy-800: #0d4475;
  --color-blue-eyed-boy-900: #082f52;
  --color-blue-eyed-boy-950: #001b37;
}

SCSS

$blue-eyed-boy: #2277cc;
$blue-eyed-boy-rgb: 34, 119, 204;
$blue-eyed-boy-light: mix(#fff, $blue-eyed-boy, 20%);
$blue-eyed-boy-dark: mix(#000, $blue-eyed-boy, 20%);

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