#01070A

CSS

:root {
  --eight-ball: #01070a;
  --eight-ball-rgb: 1 7 10;
  --eight-ball-oklch: oklch(0.12 0.018 220.3);
}

.element {
  color: var(--eight-ball);
  background-color: hsl(200 82% 2%);
  border-color: oklch(0.12 0.018 220.3);
}

Tailwind CSS v4

@theme {
  --color-eight-ball: #01070a;
  --color-eight-ball-50: #f0f6f9;
  --color-eight-ball-100: #e2e9ec;
  --color-eight-ball-200: #ccd6da;
  --color-eight-ball-300: #aebabe;
  --color-eight-ball-400: #93a1a6;
  --color-eight-ball-500: #7a898e;
  --color-eight-ball-600: #677478;
  --color-eight-ball-700: #525d60;
  --color-eight-ball-800: #3c4446;
  --color-eight-ball-900: #292f31;
  --color-eight-ball-950: #171b1d;
}

SCSS

$eight-ball: #01070a;
$eight-ball-rgb: 1, 7, 10;
$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);
}