The theme of the vim plug-in is and cannot be displayed

Question

I used Vundle to download a vim theme color accessory. After the download was completed, I closed and reopened it, but it did not take effect. What is the reason?

Answer 1

To be specified with colors:

colors molokai " 指定主题
set background=dark " 深色主题

Answer 2

Type: colorscheme scheme in vim to switch to the scheme theme. The default color theme can be configured in vimrc