How to tell which colorscheme a Vim session currently uses

Question

You can set the Vim color scheme by issuing

:colorscheme SCHEME_NAME

but, oddly enough, you can't get the currently used scheme by issuing

:colorscheme

as this results in "E471: Argument required". I also don't see the color scheme listed in the output of :set.

So how do you go about figuring out the current color scheme in use (other than manually switching the themes until you recognize it)?

Solution 1

There's no guaranteed way (as a colour scheme is essentially a load of vim commands that are sourced). However, by convention there should be a variable g:colors_name that is set to the name of the colour scheme.

Therefore, try this:

echo g:colors_name

If you get E121, it's either a poorly made colour scheme or it's the default one.

A shinier way of doing this is (for recent versions of vim):

function! ShowColourSchemeName()
    try
        echo g:colors_name
    catch /^Vim:E121/
        echo "default"
    endtry
endfunction

Then do:

:call ShowColourSchemeName()

If it says "default", do :colorscheme default and see if the colours change. If they do, you're using a malformed colour scheme and there's not a lot you can do about it other than manually switching themes until you recognise it.

The variable g:colors_name is documented here:

:help colorscheme

Solution 2

Best option is to use :colo or :colorscheme in current vim and the actual colorscheme text is shown. Please see,

:help colorscheme 

for more details.

Solution 3

A one-line version of DrAl's answer:

let current_scheme = get(g:, 'colors_name', 'default')

The get() function will fall back to 'default' if the variable has not yet been set.

Comments

[daVe]

It doesn't work to me. It says default. And the color scheme I get when I execute :colo default it's another one.

[piotao]

The first time this function is run VIM drops and error. However, when I loaded :colorscheme default, it worked well because there IS colors/default.vim colorscheme.

[VimNing]

how to do the same for neovim?