For matching parentheses, Emacs users can use a package called rainbow-delimiters that colors matching delimiters. Different levels of enclosure use different c

For matching parentheses, Emacs users can use a package called rainbow-delimiters that colors matching delimiters. Different levels of enclosure use different colors. I've found this to be too much visual noise -- I am usually just interested on the delimiters for the current s-expressions. In this vein, having multiple different colored backgrounds would be garish and distracting for me.