How to find the available colours for hi-ColorColumn in Vim

I need to set up a "colorcolumn" to indicate a length of 100 characters in vim (v7.4). Instead of using the default settings for "cterm", I would like to set a different colour.

Problem is, certain colour names I use, throw an error stating it is invalid.

E421: Color name or number not recognized: ctermbg=ivory guibg=blue

How can I find the list of available colours for my terminal?

Solution

Open vim and run the below command. It will list the available list of colours.

:so $VIMRUNTIME/syntax/colortest.vim

I already have the below two lines added in my .vimrc file.

":set colorcolumn=100,80  (set multiple colorcolumn)   

:set cc=100                                                                                         
:hi ColorColumn ctermbg=lightcyan guibg=blue

For someone curious, I found useful information in the below documentation.

Vim Documentation Syntax