Cannot set default emacs color theme in .emacs file

Question

I searched everywhere and mostly people suggest the following code for setting a default color theme:

(require 'color-theme)
(color-theme-name)

However, this doesn't work. When I start emacs I get this error:

Warning (initialization): An error occurred while loading `/home/epsilonvector/.emacs':

Symbol's function definition is void: color-theme-name

To ensure normal operation, you should investigate and remove the cause of the error in your initialization file. Start Emacs with the `--debug-init' option to view a complete error backtrace.

This happens for every theme name, even ones whose correctness I'm sure of.

What am I missing?

Answer 1

Try to insert (color-theme-initialize) in between the require and the call to the theme name.

Answer 2

First, color-theme is a package that you have to install; I don't believe it's included in any version of emacs. The download link is here.

Second, you're not supposed to literally use the symbol color-theme-name, but rather the name of the color scheme: color-theme-hober, for example.