#0D0C0B

CSS

:root {
  --black-wash: #0d0c0b;
  --black-wash-rgb: 13 12 11;
  --black-wash-oklch: oklch(0.155 0.003 67.6);
}

.element {
  color: var(--black-wash);
  background-color: hsl(30 8% 5%);
  border-color: oklch(0.155 0.003 67.6);
}

Tailwind CSS v4

@theme {
  --color-black-wash: #0d0c0b;
  --color-black-wash-50: #f5f5f4;
  --color-black-wash-100: #e8e8e7;
  --color-black-wash-200: #d5d4d3;
  --color-black-wash-300: #b8b7b6;
  --color-black-wash-400: #9f9e9d;
  --color-black-wash-500: #878684;
  --color-black-wash-600: #727170;
  --color-black-wash-700: #5c5a59;
  --color-black-wash-800: #434241;
  --color-black-wash-900: #2e2e2d;
  --color-black-wash-950: #1b1a1a;
}

SCSS

$black-wash: #0d0c0b;
$black-wash-rgb: 13, 12, 11;
$black-wash-light: mix(#fff, $black-wash, 20%);
$black-wash-dark: mix(#000, $black-wash, 20%);

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