#050609

CSS

:root {
  --eight-ball: #050609;
  --eight-ball-rgb: 5 6 9;
  --eight-ball-oklch: oklch(0.122 0.009 268.1);
}

.element {
  color: var(--eight-ball);
  background-color: hsl(225 29% 3%);
  border-color: oklch(0.122 0.009 268.1);
}

Tailwind CSS v4

@theme {
  --color-eight-ball: #050609;
  --color-eight-ball-50: #f4f5f8;
  --color-eight-ball-100: #e7e8eb;
  --color-eight-ball-200: #d3d4d8;
  --color-eight-ball-300: #b5b7bc;
  --color-eight-ball-400: #9c9ea4;
  --color-eight-ball-500: #84868c;
  --color-eight-ball-600: #6f7176;
  --color-eight-ball-700: #595b5f;
  --color-eight-ball-800: #414245;
  --color-eight-ball-900: #2d2e30;
  --color-eight-ball-950: #1a1b1c;
}

SCSS

$eight-ball: #050609;
$eight-ball-rgb: 5, 6, 9;
$eight-ball-light: mix(#fff, $eight-ball, 20%);
$eight-ball-dark: mix(#000, $eight-ball, 20%);

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