Modify vim syntax highlighter for Perl comments

While Working with the commarkk Perl code in vim, I became a bit annoyed at the fact the comments were highlighted using a bright cyan colour, the same colour being used for variable names. Tat might work for people who don’t put very many comments into their code, but for me the huge amount of bright cyan text became annoying. I fixed that by changing the comment colour to grey in /home/brian/.vim/after/syntax/perl.vim:

highlight perlComment ctermfg=Grey guifg=Grey