Changing hi VertSplit guibg=anycolor

[redeemefy]

I don't know why.... if I write this line of code after

if has('gui_running')
set background=dark
    colorscheme solarized
else
    colorscheme zenburn
endif

hi VertSplit guibg=blue

the code doesn't work. However, if I run the same line of code in the as a temporary command does work. Why is this happening?

[gillyb]

I reached this comment by googling the same problem, and now I solved it, so thought it might help you to know:

This probably doesn't have any effect since you're probably initializing some plugin or a setting that is overriding this. Try adding hi VertSplit guibg=blue as the last line in your vim settings file. That worked for me.