Colored terminal output - yihui/xaringan GitHub Wiki
Thanks to the fansi package you can have colored code output.
This works nicely together with tibbles.
See https://twitter.com/BrodieGaslam/status/1029059002225721344 for a preview.
To enable it, add options(crayon.enabled = TRUE) in the knitr setup chunk and install fansi > v0.3.