#07090E

CSS

:root {
  --eight-ball: #07090e;
  --eight-ball-rgb: 7 9 14;
  --eight-ball-oklch: oklch(0.14 0.012 265.8);
}

.element {
  color: var(--eight-ball);
  background-color: hsl(223 33% 4%);
  border-color: oklch(0.14 0.012 265.8);
}

Tailwind CSS v4

@theme {
  --color-eight-ball: #07090e;
  --color-eight-ball-50: #f4f5f9;
  --color-eight-ball-100: #e6e8ec;
  --color-eight-ball-200: #d2d4d9;
  --color-eight-ball-300: #b5b7be;
  --color-eight-ball-400: #9b9ea6;
  --color-eight-ball-500: #82868e;
  --color-eight-ball-600: #6e7278;
  --color-eight-ball-700: #585b60;
  --color-eight-ball-800: #404247;
  --color-eight-ball-900: #2c2e31;
  --color-eight-ball-950: #191b1d;
}

SCSS

$eight-ball: #07090e;
$eight-ball-rgb: 7, 9, 14;
$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);
}