User blog comment:Kirkburn/Syntax highlighting - helping you read and write code/@comment-26179655-20150312033731/@comment-26009167-20150312035207

As far as I know, unless you override the wiki colors in your personal CSS (or your JS if need be), the theme and thus the colors of any editor used is based on your wiki theme colors set through the Theme Designer.

For example, I have a wiki that is primarily themed around shades of green. Thus, the editor takes on those colors in the form of a light shade of green.