#091A19

CSS

:root {
  --black-stallion: #091a19;
  --black-stallion-rgb: 9 26 25;
  --black-stallion-oklch: oklch(0.203 0.023 190.5);
}

.element {
  color: var(--black-stallion);
  background-color: hsl(176 49% 7%);
  border-color: oklch(0.203 0.023 190.5);
}

Tailwind CSS v4

@theme {
  --color-black-stallion: #091a19;
  --color-black-stallion-50: #eef7f7;
  --color-black-stallion-100: #e0eaea;
  --color-black-stallion-200: #cad7d7;
  --color-black-stallion-300: #abbbba;
  --color-black-stallion-400: #90a3a1;
  --color-black-stallion-500: #758b8a;
  --color-black-stallion-600: #647674;
  --color-black-stallion-700: #4f5e5d;
  --color-black-stallion-800: #3a4544;
  --color-black-stallion-900: #28302f;
  --color-black-stallion-950: #161c1b;
}

SCSS

$black-stallion: #091a19;
$black-stallion-rgb: 9, 26, 25;
$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);
}