Black Tie

CSS

:root {
  --black-tie: #464647;
  --black-tie-rgb: 70 70 71;
  --black-tie-oklch: oklch(0.395 0.002 286.3);
}

.element {
  color: var(--black-tie);
  background-color: hsl(240 1% 28%);
  border-color: oklch(0.395 0.002 286.3);
}

Tailwind CSS v4

@theme {
  --color-black-tie: #464647;
  --color-black-tie-50: #f5f5f5;
  --color-black-tie-100: #e8e8e8;
  --color-black-tie-200: #d4d4d5;
  --color-black-tie-300: #b7b7b8;
  --color-black-tie-400: #9e9e9f;
  --color-black-tie-500: #868687;
  --color-black-tie-600: #717172;
  --color-black-tie-700: #5b5b5b;
  --color-black-tie-800: #424243;
  --color-black-tie-900: #2e2e2e;
  --color-black-tie-950: #1a1a1b;
}

SCSS

$black-tie: #464647;
$black-tie-rgb: 70, 70, 71;
$black-tie-light: mix(#fff, $black-tie, 20%);
$black-tie-dark: mix(#000, $black-tie, 20%);

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