Heavy Metal Armour

CSS

:root {
  --heavy-metal-armour: #888a8e;
  --heavy-metal-armour-rgb: 136 138 142;
  --heavy-metal-armour-oklch: oklch(0.633 0.006 264.5);
}

.element {
  color: var(--heavy-metal-armour);
  background-color: hsl(220 3% 55%);
  border-color: oklch(0.633 0.006 264.5);
}

Tailwind CSS v4

@theme {
  --color-heavy-metal-armour: #888a8e;
  --color-heavy-metal-armour-50: #f4f5f7;
  --color-heavy-metal-armour-100: #e7e8ea;
  --color-heavy-metal-armour-200: #d3d4d7;
  --color-heavy-metal-armour-300: #b6b7bb;
  --color-heavy-metal-armour-400: #9c9ea2;
  --color-heavy-metal-armour-500: #84868a;
  --color-heavy-metal-armour-600: #707275;
  --color-heavy-metal-armour-700: #595b5e;
  --color-heavy-metal-armour-800: #414245;
  --color-heavy-metal-armour-900: #2d2e2f;
  --color-heavy-metal-armour-950: #1a1b1c;
}

SCSS

$heavy-metal-armour: #888a8e;
$heavy-metal-armour-rgb: 136, 138, 142;
$heavy-metal-armour-light: mix(#fff, $heavy-metal-armour, 20%);
$heavy-metal-armour-dark: mix(#000, $heavy-metal-armour, 20%);

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