Better look for Callouts

I use the minimal theme. I really wish the callouts wouldn’t look all colourful at every step, but rather where they become a box-like structure.

The “Outlines” callout style in the Styles Settings plugin is something similar I am looking for, but the font in that is really small, really wish the font was of the same size.

You can customise callouts via CSS or even create your own callouts. Take a look at the callouts documentation and this section about CSS-snippets.