#1C1C1C

CSS

:root {
  --coco-s-black: #1c1c1c;
  --coco-s-black-rgb: 28 28 28;
  --coco-s-black-oklch: oklch(0.226 0 0);
}

.element {
  color: var(--coco-s-black);
  background-color: hsl(0 0% 11%);
  border-color: oklch(0.226 0 0);
}

Tailwind CSS v4

@theme {
  --color-coco-s-black: #1c1c1c;
  --color-coco-s-black-50: #f5f5f5;
  --color-coco-s-black-100: #e8e8e8;
  --color-coco-s-black-200: #d4d4d4;
  --color-coco-s-black-300: #b7b7b7;
  --color-coco-s-black-400: #9e9e9e;
  --color-coco-s-black-500: #868686;
  --color-coco-s-black-600: #717171;
  --color-coco-s-black-700: #5b5b5b;
  --color-coco-s-black-800: #424242;
  --color-coco-s-black-900: #2e2e2e;
  --color-coco-s-black-950: #1b1b1b;
}

SCSS

$coco-s-black: #1c1c1c;
$coco-s-black-rgb: 28, 28, 28;
$coco-s-black-light: mix(#fff, $coco-s-black, 20%);
$coco-s-black-dark: mix(#000, $coco-s-black, 20%);

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