#0E0D2F

CSS

:root {
  --infinite-night: #0e0d2f;
  --infinite-night-rgb: 14 13 47;
  --infinite-night-oklch: oklch(0.186 0.066 279.1);
}

.element {
  color: var(--infinite-night);
  background-color: hsl(242 57% 12%);
  border-color: oklch(0.186 0.066 279.1);
}

Tailwind CSS v4

@theme {
  --color-infinite-night: #0e0d2f;
  --color-infinite-night-50: #f1f3ff;
  --color-infinite-night-100: #e3e6fe;
  --color-infinite-night-200: #cfd2f1;
  --color-infinite-night-300: #b1b4d9;
  --color-infinite-night-400: #969bc6;
  --color-infinite-night-500: #7c82b2;
  --color-infinite-night-600: #696e96;
  --color-infinite-night-700: #545878;
  --color-infinite-night-800: #3c4059;
  --color-infinite-night-900: #292c3e;
  --color-infinite-night-950: #171928;
}

SCSS

$infinite-night: #0e0d2f;
$infinite-night-rgb: 14, 13, 47;
$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);
}