#13060A

CSS

:root {
  --dark-matter: #13060a;
  --dark-matter-rgb: 19 6 10;
  --dark-matter-oklch: oklch(0.146 0.026 359.2);
}

.element {
  color: var(--dark-matter);
  background-color: hsl(342 52% 5%);
  border-color: oklch(0.146 0.026 359.2);
}

Tailwind CSS v4

@theme {
  --color-dark-matter: #13060a;
  --color-dark-matter-50: #fcf2f4;
  --color-dark-matter-100: #f0e4e7;
  --color-dark-matter-200: #ded0d3;
  --color-dark-matter-300: #c4b2b6;
  --color-dark-matter-400: #ac989e;
  --color-dark-matter-500: #967f86;
  --color-dark-matter-600: #7e6c71;
  --color-dark-matter-700: #65565a;
  --color-dark-matter-800: #4a3f42;
  --color-dark-matter-900: #342b2e;
  --color-dark-matter-950: #1f191b;
}

SCSS

$dark-matter: #13060a;
$dark-matter-rgb: 19, 6, 10;
$dark-matter-light: mix(#fff, $dark-matter, 20%);
$dark-matter-dark: mix(#000, $dark-matter, 20%);

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