#0A0D01

CSS

:root {
  --memorial-black: #0a0d01;
  --memorial-black-rgb: 10 13 1;
  --memorial-black-oklch: oklch(0.151 0.031 118.7);
}

.element {
  color: var(--memorial-black);
  background-color: hsl(75 86% 3%);
  border-color: oklch(0.151 0.031 118.7);
}

Tailwind CSS v4

@theme {
  --color-memorial-black: #0a0d01;
  --color-memorial-black-50: #f4f7ed;
  --color-memorial-black-100: #e6eade;
  --color-memorial-black-200: #d2d6c8;
  --color-memorial-black-300: #b5baa9;
  --color-memorial-black-400: #9ca18d;
  --color-memorial-black-500: #848972;
  --color-memorial-black-600: #6f7461;
  --color-memorial-black-700: #595d4d;
  --color-memorial-black-800: #414438;
  --color-memorial-black-900: #2d2f26;
  --color-memorial-black-950: #1a1b14;
}

SCSS

$memorial-black: #0a0d01;
$memorial-black-rgb: 10, 13, 1;
$memorial-black-light: mix(#fff, $memorial-black, 20%);
$memorial-black-dark: mix(#000, $memorial-black, 20%);

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