UI-паттерны из Uiverse (Galaxy) — CSS-паттерн фона

<div class="pattern-demo">Контент поверх узора</div>
<style>
.pattern-demo {
  min-height: 8rem;
  display: grid;
  place-items: center;
  font-weight: 600;
  color: #333;
  background-color: #fafafa;
  background-image: repeating-conic-gradient(
    from 0deg at 50% 50%,
    #e9ecef 0deg 90deg,
    transparent 90deg 180deg
  );
  background-size: 24px 24px;
}
</style>