Color and syntax theme issue in Vim

I am unable to apply color and syntax setting. Can someone please suggest me the correct way?

Created these directories in /home/ec2-user directory.

mkdir ~/.vim
mkdir ~/.vim/colors
mkdir ~/.vim/syntax

Added php.vim in syntax and wombat256.vim in colors directory.

vimrc file is present in /etc directory.

:colorscheme wombat256.vim
E185: Cannot find color scheme wombat256.vim

I am following instruction from here.

Solution

:colorscheme wombat256

should work fine.