Absence of Light

CSS

:root {
  --absence-of-light: #15151c;
  --absence-of-light-rgb: 21 21 28;
  --absence-of-light-oklch: oklch(0.199 0.014 285.1);
}

.element {
  color: var(--absence-of-light);
  background-color: hsl(240 14% 10%);
  border-color: oklch(0.199 0.014 285.1);
}

Tailwind CSS v4

@theme {
  --color-absence-of-light: #15151c;
  --color-absence-of-light-50: #f5f5f9;
  --color-absence-of-light-100: #e7e7ec;
  --color-absence-of-light-200: #d3d3da;
  --color-absence-of-light-300: #b7b6be;
  --color-absence-of-light-400: #9d9da7;
  --color-absence-of-light-500: #85858f;
  --color-absence-of-light-600: #707179;
  --color-absence-of-light-700: #5a5a61;
  --color-absence-of-light-800: #414247;
  --color-absence-of-light-900: #2d2d31;
  --color-absence-of-light-950: #1a1a1d;
}

SCSS

$absence-of-light: #15151c;
$absence-of-light-rgb: 21, 21, 28;
$absence-of-light-light: mix(#fff, $absence-of-light, 20%);
$absence-of-light-dark: mix(#000, $absence-of-light, 20%);

.element {
  color: $absence-of-light;
  box-shadow: 0 0 0 2px rgba($absence-of-light, 0.35);
}