:root {
  --block-bg-opacity: .5;
}

.getting-started {
  background-color: rgba(93, 152, 246, var(--block-bg-opacity));
}

.user-guides {
  background-color: rgba(59, 167, 155, var(--block-bg-opacity));
}

.developer-docs {
  background-color: rgba(235, 129, 252, var(--block-bg-opacity));
}