#091A1B

CSS

:root {
  --black-stallion: #091a1b;
  --black-stallion-rgb: 9 26 27;
  --black-stallion-oklch: oklch(0.204 0.023 200.5);
}

.element {
  color: var(--black-stallion);
  background-color: hsl(183 50% 7%);
  border-color: oklch(0.204 0.023 200.5);
}

Tailwind CSS v4

@theme {
  --color-black-stallion: #091a1b;
  --color-black-stallion-50: #eef7f8;
  --color-black-stallion-100: #e0eaeb;
  --color-black-stallion-200: #cad7d8;
  --color-black-stallion-300: #abbbbc;
  --color-black-stallion-400: #90a3a4;
  --color-black-stallion-500: #758b8c;
  --color-black-stallion-600: #637677;
  --color-black-stallion-700: #4f5e5f;
  --color-black-stallion-800: #394545;
  --color-black-stallion-900: #273030;
  --color-black-stallion-950: #151c1c;
}

SCSS

$black-stallion: #091a1b;
$black-stallion-rgb: 9, 26, 27;
$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);
}