add vim color plugin, so simple yet so nice

nvimrc

@@ -24,6 +24,7 @@ Plug 'octol/vim-cpp-enhanced-highlight'
 Plug 'junegunn/goyo.vim'
 Plug 'junegunn/limelight.vim'
 Plug 'lervag/vimtex'
+Plug 'ap/vim-css-color'
 " Plug 'gilligan/vim-lldb'
 Plug 'atelierbram/vim-colors_atelier-schemes'
 Plug 'baeuml/summerfruit256.vim'