```ruby
Chartkick.options = {
  content_for: :charts_js,
  colors: ["rgba(61, 149, 236, 1)"]
}
```

Use Chartkick with defer option
user
```ruby
Chartkick.options = {
  content_for: :charts_js,
  defer: true,
  colors: ["rgba(61, 149, 236, 1)"]
}
```
assistant