TMUX and Nvim, Vim working O,K colors from themes working as they should

.tmux.conf

# this is .tmux.conf which is under  .tmux/.tmux.conf
set -g default-terminal "xterm-256color" # this line has to be the first line in .tmux.conf or it will give a lot/ unexisting  of trouble

.tmux.conf.local

#After so many trial and error I changed this to true. I'm not sure about it but, it could be...

# RGB 24-bit colour support (tmux >= 2.2), possible values are:
#  - true
#  - false (default)
tmux_conf_theme_24b_colour=true

init.vim

"This is my conf...
"This file goes under .config/nvim I'm using  Ubuntu 16.04

" Specify a directory for plugins (for Neovim: ~/.local/share/nvim/plugged)
call plug#begin('~/.vim/plugged')

" Make sure you use single quotes

" Shorthand notation; fetches https://github.com/junegunn/vim-easy-align
"Plug 'junegunn/vim-easy-align'

" Any valid git URL is allowed
Plug 'https://github.com/junegunn/vim-github-dashboard.git'

" Multiple Plug commands can be written in a single line using | separators
Plug 'SirVer/ultisnips' | Plug 'honza/vim-snippets'

" On-demand loading
Plug 'scrooloose/nerdtree', { 'on':  'NERDTreeToggle' }
Plug 'Xuyuanp/nerdtree-git-plugin'
Plug 'mhartington/oceanic-next'
Plug 'ayu-theme/ayu-vim'
Plug 'crusoexia/vim-monokai'
"Eslint
"Plug 'https://github.com/vim-syntastic/syntastic.git'
"git gutter
"Plug 'airblade/vim-gitgutter'
Plug 'airblade/vim-gitgutter'
" this is for airline
Plug 'vim-airline/vim-airline'
Plug 'vim-airline/vim-airline-themes'

Plug 'https://github.com/ctrlpvim/ctrlp.vim'



"this is for the JS
"Plug 'https://github.com/pangloss/vim-javascript.git'
Plug 'pangloss/vim-javascript', { 'for': ['javascript', 'javascript.jsx'] }
Plug 'mxw/vim-jsx', { 'for': ['javascript', 'javascript.jsx'] }
Plug 'elzr/vim-json'
Plug 'hashivim/vim-terraform'

"YCM
Plug 'https://github.com/Valloric/YouCompleteMe.git'
" Initialize plugin system
call plug#end()
"git gutter
set updatetime=250 " so that it reflects faster
"FIXIN COLORS

" Or if you have Neovim >= 0.1.5
if (has("termguicolors"))
 set termguicolors
endif

" Themes
syntax enable
colorscheme OceanicNext

let g:airline_powerline_fonts = 1
let g:airline_theme='tomorrow'
"let g:airline_theme='molokai'
let g:airline#extensions#tabline#enabled = 1
"
"*****************JS PART****************
let g:jsx_ext_required = 0 " Allow JSX in normal JS files
"this is the indentation part

" this is so Allow vim-terraform to align settings automatically with Tabularize. 
 let g:terraform_align=1


set tabline=0
" size of a hard tabstop
set tabstop=4

" always uses spaces instead of tab characters
set expandtab
" size of an "indent"
set shiftwidth=2
"Additional configuration
"

"filetype plugin indent on
"syntax enable
set number

" use jshint
let g:syntastic_javascript_checkers = ['jshint']

" show any linting errors immediately
let g:syntastic_check_on_open = 1
"this is for CtrlP
let g:ctrlp_user_command = ['.git', 'cd %s && git ls-files -co --exclude-standard']