Change the default colouring scheme for blocks of code

[b1azk0]

Is there an easy way to change the default coloring scheme of block of code?

Looks the theme defaults to highlight: zenburn from RMakrdown documents but I'm not 100%sure. In a regular RMarkdownw document I would change html output in yaml to:

output:
  html_document:
    theme: united
    highlight: tango

But with hugo themes and blogdown I'm not sure where and how make these changes.

(this is most likely my last issue :) ) thank you for all the help

PS. same question is posted at stack: https://stackoverflow.com/questions/48075493/change-style-color-of-blocks-of-code-in-blogdown