vim colorscheme not apply clearly

Question

I apply colorscheme by writing in _vimrc file, but colors are working Partially.

I brought source code of colorscheme from code-dark using Plugin Vundle.

For explanation, upload the pictures. First picture is example of code dark, second picture is result of applying colorscheme to gvim in window. As you can see, the colorscheme is working Partially. And other all colorscheme code show this problem when I applying to gvim.

I guess the process have some discrepancy between open source and vim script language. But I can't understand code clearly...

Anyone have experience about this issue? Or any question seen before?

I'm really appreciate if you give any help. I wish your advice.

thank you for reading the question.

my _vimrc code

syntax on  
set encoding=utf-8  
set autowrite 
set autoindent 
set shiftwidth=4 
set smartindent
set nu " show line number
set incsearch 
set mouse=a 
set guifont=consolas:h11
set nocompatible
filetype off 
set rtp+=~/.vim/bundle/Vundle.vim
call vundle#begin()
Plugin 'VundleVim/Vundle.vim'
Plugin 'vim-airline/vim-airline' 
Plugin 'vim-airline/vim-airline-themes'
Plugin 'airblade/vim-gitgutter'

Plugin 'ctrlpvim/ctrlp.vim'

Plugin 'hynek/vim-python-pep8-indent'

Plugin 'nvie/vim-flake8'
Plugin 'tomasiser/vim-code-dark'
" for colorscheme
call vundle#end()

filetype plugin indent on
colorscheme codedark
filetype plugin indent on

let g:airline_powerline_fonts = 1
let g:airline_theme = 'codedark' 

version

• vim _ window : 8.2