#141433

CSS

:root {
  --infinite-night: #141433;
  --infinite-night-rgb: 20 20 51;
  --infinite-night-oklch: oklch(0.211 0.06 280);
}

.element {
  color: var(--infinite-night);
  background-color: hsl(240 44% 14%);
  border-color: oklch(0.211 0.06 280);
}

Tailwind CSS v4

@theme {
  --color-infinite-night: #141433;
  --color-infinite-night-50: #f2f4ff;
  --color-infinite-night-100: #e4e6fc;
  --color-infinite-night-200: #d0d2ee;
  --color-infinite-night-300: #b2b4d6;
  --color-infinite-night-400: #979bc2;
  --color-infinite-night-500: #7e82ae;
  --color-infinite-night-600: #6b6e93;
  --color-infinite-night-700: #555876;
  --color-infinite-night-800: #3d4157;
  --color-infinite-night-900: #2a2c3d;
  --color-infinite-night-950: #181926;
}

SCSS

$infinite-night: #141433;
$infinite-night-rgb: 20, 20, 51;
$infinite-night-light: mix(#fff, $infinite-night, 20%);
$infinite-night-dark: mix(#000, $infinite-night, 20%);

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