The callout (a.k.a. 'card') component provides an element that you can use to call out important information to your users by displaying a box with consistent styling.
rails g instrumental:callout
To insert a component into a view:
rails g instrumental:callout:insert
Find all of your customization options (via local variables) in this file:
app/views/shared/components/_callout.html.erb
I created Instrumental Components to make designing and building professional apps with Ruby on Rails easy, fast, and fun. I use it on all of my projects and I hope it helps you build something great.