#777476

CSS

:root {
  --bank-vault: #777476;
  --bank-vault-rgb: 119 116 118;
  --bank-vault-oklch: oklch(0.562 0.005 337.4);
}

.element {
  color: var(--bank-vault);
  background-color: hsl(320 1% 46%);
  border-color: oklch(0.562 0.005 337.4);
}

Tailwind CSS v4

@theme {
  --color-bank-vault: #777476;
  --color-bank-vault-50: #f6f4f5;
  --color-bank-vault-100: #e9e7e8;
  --color-bank-vault-200: #d6d3d5;
  --color-bank-vault-300: #b9b6b8;
  --color-bank-vault-400: #a09d9f;
  --color-bank-vault-500: #888587;
  --color-bank-vault-600: #737072;
  --color-bank-vault-700: #5c5a5b;
  --color-bank-vault-800: #434243;
  --color-bank-vault-900: #2f2d2e;
  --color-bank-vault-950: #1b1a1b;
}

SCSS

$bank-vault: #777476;
$bank-vault-rgb: 119, 116, 118;
$bank-vault-light: mix(#fff, $bank-vault, 20%);
$bank-vault-dark: mix(#000, $bank-vault, 20%);

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