#000F10

CSS

:root {
  --black-stallion: #000f10;
  --black-stallion-rgb: 0 15 16;
  --black-stallion-oklch: oklch(0.153 0.026 199.5);
}

.element {
  color: var(--black-stallion);
  background-color: hsl(184 100% 3%);
  border-color: oklch(0.153 0.026 199.5);
}

Tailwind CSS v4

@theme {
  --color-black-stallion: #000f10;
  --color-black-stallion-50: #edf7f8;
  --color-black-stallion-100: #deebeb;
  --color-black-stallion-200: #c8d8d9;
  --color-black-stallion-300: #a9bcbd;
  --color-black-stallion-400: #8da3a4;
  --color-black-stallion-500: #738c8d;
  --color-black-stallion-600: #617677;
  --color-black-stallion-700: #4e5f5f;
  --color-black-stallion-800: #384545;
  --color-black-stallion-900: #263030;
  --color-black-stallion-950: #151c1c;
}

SCSS

$black-stallion: #000f10;
$black-stallion-rgb: 0, 15, 16;
$black-stallion-light: mix(#fff, $black-stallion, 20%);
$black-stallion-dark: mix(#000, $black-stallion, 20%);

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