#050601

CSS

:root {
  --black-metal: #050601;
  --black-metal-rgb: 5 6 1;
  --black-metal-oklch: oklch(0.117 0.02 116.2);
}

.element {
  color: var(--black-metal);
  background-color: hsl(72 71% 1%);
  border-color: oklch(0.117 0.02 116.2);
}

Tailwind CSS v4

@theme {
  --color-black-metal: #050601;
  --color-black-metal-50: #f4f6f0;
  --color-black-metal-100: #e7e9e1;
  --color-black-metal-200: #d3d6cc;
  --color-black-metal-300: #b6b9ad;
  --color-black-metal-400: #9da093;
  --color-black-metal-500: #858879;
  --color-black-metal-600: #717367;
  --color-black-metal-700: #5a5c52;
  --color-black-metal-800: #42433b;
  --color-black-metal-900: #2e2e29;
  --color-black-metal-950: #1a1b17;
}

SCSS

$black-metal: #050601;
$black-metal-rgb: 5, 6, 1;
$black-metal-light: mix(#fff, $black-metal, 20%);
$black-metal-dark: mix(#000, $black-metal, 20%);

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