#081A1C

CSS

:root {
  --black-stallion: #081a1c;
  --black-stallion-rgb: 8 26 28;
  --black-stallion-oklch: oklch(0.203 0.024 204.9);
}

.element {
  color: var(--black-stallion);
  background-color: hsl(186 56% 7%);
  border-color: oklch(0.203 0.024 204.9);
}

Tailwind CSS v4

@theme {
  --color-black-stallion: #081a1c;
  --color-black-stallion-50: #eef7f9;
  --color-black-stallion-100: #dfeaec;
  --color-black-stallion-200: #c9d7d9;
  --color-black-stallion-300: #aabbbe;
  --color-black-stallion-400: #8fa3a5;
  --color-black-stallion-500: #748b8e;
  --color-black-stallion-600: #627678;
  --color-black-stallion-700: #4f5e60;
  --color-black-stallion-800: #394546;
  --color-black-stallion-900: #273030;
  --color-black-stallion-950: #151c1d;
}

SCSS

$black-stallion: #081a1c;
$black-stallion-rgb: 8, 26, 28;
$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);
}