coc.nvim suggestion menu current selection is not visible

[luciandf]

when I write some text and coc presents the list of suggestions I cannot see which I select. See an example in the screen shot:

What do i have to modify to see the selection like it is the case with a different theme (e.g. seoul256)

These are the relevant lines in the .vimrc

set termguicolors                                                                                                                                                                    
set background=dark                                                                                                                                                                  
let g:ayucolor="mirage"                                                                                                                                                              
set t_Co=256                                                                                                                                                                         
colorscheme ayu                                                                                                                                                                                                                                                                                                        
"colorscheme seoul256                                                                                                                                                                 

[mkayyash]

Add these:

highlight! link CocPumMenu Pmenu
highlight! link CocMenuSel PmenuSel