Lights Out

CSS

:root {
  --lights-out: #3d474b;
  --lights-out-rgb: 61 71 75;
  --lights-out-oklch: oklch(0.39 0.015 223.9);
}

.element {
  color: var(--lights-out);
  background-color: hsl(197 10% 27%);
  border-color: oklch(0.39 0.015 223.9);
}

Tailwind CSS v4

@theme {
  --color-lights-out: #3d474b;
  --color-lights-out-50: #f1f6f8;
  --color-lights-out-100: #e3e9ec;
  --color-lights-out-200: #ced6d9;
  --color-lights-out-300: #b0b9bd;
  --color-lights-out-400: #96a0a5;
  --color-lights-out-500: #7c888d;
  --color-lights-out-600: #697378;
  --color-lights-out-700: #545c60;
  --color-lights-out-800: #3d4446;
  --color-lights-out-900: #2a2f30;
  --color-lights-out-950: #181b1d;
}

SCSS

$lights-out: #3d474b;
$lights-out-rgb: 61, 71, 75;
$lights-out-light: mix(#fff, $lights-out, 20%);
$lights-out-dark: mix(#000, $lights-out, 20%);

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