#01080D

CSS

:root {
  --eight-ball: #01080d;
  --eight-ball-rgb: 1 8 13;
  --eight-ball-oklch: oklch(0.127 0.021 228.8);
}

.element {
  color: var(--eight-ball);
  background-color: hsl(205 86% 3%);
  border-color: oklch(0.127 0.021 228.8);
}

Tailwind CSS v4

@theme {
  --color-eight-ball: #01080d;
  --color-eight-ball-50: #eff6fa;
  --color-eight-ball-100: #e1e9ee;
  --color-eight-ball-200: #ccd6dc;
  --color-eight-ball-300: #adbac0;
  --color-eight-ball-400: #92a1a8;
  --color-eight-ball-500: #798991;
  --color-eight-ball-600: #66747b;
  --color-eight-ball-700: #525d62;
  --color-eight-ball-800: #3b4448;
  --color-eight-ball-900: #292f32;
  --color-eight-ball-950: #161b1e;
}

SCSS

$eight-ball: #01080d;
$eight-ball-rgb: 1, 8, 13;
$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);
}