#201E32

CSS

:root {
  --black-velvet: #201e32;
  --black-velvet-rgb: 32 30 50;
  --black-velvet-oklch: oklch(0.247 0.038 287.9);
}

.element {
  color: var(--black-velvet);
  background-color: hsl(246 25% 16%);
  border-color: oklch(0.247 0.038 287.9);
}

Tailwind CSS v4

@theme {
  --color-black-velvet: #201e32;
  --color-black-velvet-50: #f5f4ff;
  --color-black-velvet-100: #e7e6f4;
  --color-black-velvet-200: #d3d2e4;
  --color-black-velvet-300: #b7b5ca;
  --color-black-velvet-400: #9d9bb4;
  --color-black-velvet-500: #84839e;
  --color-black-velvet-600: #706f86;
  --color-black-velvet-700: #5a586b;
  --color-black-velvet-800: #41414f;
  --color-black-velvet-900: #2d2d37;
  --color-black-velvet-950: #1a1a22;
}

SCSS

$black-velvet: #201e32;
$black-velvet-rgb: 32, 30, 50;
$black-velvet-light: mix(#fff, $black-velvet, 20%);
$black-velvet-dark: mix(#000, $black-velvet, 20%);

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