#10191B

CSS

:root {
  --black-stallion: #10191b;
  --black-stallion-rgb: 16 25 27;
  --black-stallion-oklch: oklch(0.205 0.014 212.9);
}

.element {
  color: var(--black-stallion);
  background-color: hsl(191 26% 8%);
  border-color: oklch(0.205 0.014 212.9);
}

Tailwind CSS v4

@theme {
  --color-black-stallion: #10191b;
  --color-black-stallion-50: #f1f6f7;
  --color-black-stallion-100: #e3e9eb;
  --color-black-stallion-200: #ced6d8;
  --color-black-stallion-300: #b0b9bc;
  --color-black-stallion-400: #96a1a3;
  --color-black-stallion-500: #7c898c;
  --color-black-stallion-600: #697476;
  --color-black-stallion-700: #545d5e;
  --color-black-stallion-800: #3d4445;
  --color-black-stallion-900: #2a2f30;
  --color-black-stallion-950: #181b1c;
}

SCSS

$black-stallion: #10191b;
$black-stallion-rgb: 16, 25, 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);
}