#030A0E

CSS

:root {
  --eight-ball: #030a0e;
  --eight-ball-rgb: 3 10 14;
  --eight-ball-oklch: oklch(0.138 0.017 227.3);
}

.element {
  color: var(--eight-ball);
  background-color: hsl(202 65% 3%);
  border-color: oklch(0.138 0.017 227.3);
}

Tailwind CSS v4

@theme {
  --color-eight-ball: #030a0e;
  --color-eight-ball-50: #f0f6f9;
  --color-eight-ball-100: #e2e9ec;
  --color-eight-ball-200: #cdd6da;
  --color-eight-ball-300: #afb9be;
  --color-eight-ball-400: #95a1a6;
  --color-eight-ball-500: #7b898f;
  --color-eight-ball-600: #687479;
  --color-eight-ball-700: #535c61;
  --color-eight-ball-800: #3c4447;
  --color-eight-ball-900: #2a2f31;
  --color-eight-ball-950: #171b1d;
}

SCSS

$eight-ball: #030a0e;
$eight-ball-rgb: 3, 10, 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);
}