Using Marmalade:

(require ‘package)
(add-to-list ‘package-archives
             ‘("marmalade" . "http://marmalade-repo.org/packages/"))
(package-initialize)

Using MELPA:

(require ‘package)
(add-to-list ‘package-archives
             ‘("melpa" . "http://melpa.milkbox.net/packages/") t)
(package-initialize)

• M-x eval-buffer

• M-x package-refresh-contents

• M-x package-list-packages

• M-x package-install solarized-theme

emacs install solarized theme