#08010A

CSS

:root {
  --narwhal-grey: #08010a;
  --narwhal-grey-rgb: 8 1 10;
  --narwhal-grey-oklch: oklch(0.103 0.037 321.6);
}

.element {
  color: var(--narwhal-grey);
  background-color: hsl(287 82% 2%);
  border-color: oklch(0.103 0.037 321.6);
}

Tailwind CSS v4

@theme {
  --color-narwhal-grey: #08010a;
  --color-narwhal-grey-50: #fbf2fb;
  --color-narwhal-grey-100: #eee4ef;
  --color-narwhal-grey-200: #dccfdd;
  --color-narwhal-grey-300: #c1b1c2;
  --color-narwhal-grey-400: #a998ac;
  --color-narwhal-grey-500: #927e95;
  --color-narwhal-grey-600: #7c6b7e;
  --color-narwhal-grey-700: #635665;
  --color-narwhal-grey-800: #483e4b;
  --color-narwhal-grey-900: #322b34;
  --color-narwhal-grey-950: #1e181f;
}

SCSS

$narwhal-grey: #08010a;
$narwhal-grey-rgb: 8, 1, 10;
$narwhal-grey-light: mix(#fff, $narwhal-grey, 20%);
$narwhal-grey-dark: mix(#000, $narwhal-grey, 20%);

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