Black Cat

CSS

:root {
  --black-cat: #2e2f31;
  --black-cat-rgb: 46 47 49;
  --black-cat-oklch: oklch(0.305 0.004 264.5);
}

.element {
  color: var(--black-cat);
  background-color: hsl(220 3% 19%);
  border-color: oklch(0.305 0.004 264.5);
}

Tailwind CSS v4

@theme {
  --color-black-cat: #2e2f31;
  --color-black-cat-50: #f4f5f6;
  --color-black-cat-100: #e7e8e9;
  --color-black-cat-200: #d3d4d6;
  --color-black-cat-300: #b6b7b9;
  --color-black-cat-400: #9d9ea1;
  --color-black-cat-500: #858689;
  --color-black-cat-600: #707174;
  --color-black-cat-700: #5a5b5d;
  --color-black-cat-800: #424244;
  --color-black-cat-900: #2d2e2f;
  --color-black-cat-950: #1a1b1b;
}

SCSS

$black-cat: #2e2f31;
$black-cat-rgb: 46, 47, 49;
$black-cat-light: mix(#fff, $black-cat, 20%);
$black-cat-dark: mix(#000, $black-cat, 20%);

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