change drop down list to radio buttons

In my RoR app I would like to change a drop down list, which dispays a
list of colors selected from the database. Instead I would like to
create a radio button for each color. The user is allowed to check one
color and this will be saved back into the database as the color for
this user.
I don't know how to do this. Currently it looks like this:

<%= select(:user, :color_id, Color.find(:all).collect {|c| [, ] }, { :include_blank => false })%>

Color.find(:all).each do |color|
  <%= select :user, :color_id,, :style=>"background:
##{color.rgb_value};" %>

Okay, the style part is not really required but it might make for an
interesting way for your users to select their color -- they'd see it
displayed on the UI.


Color.find(:all).each do |color|
  <input type="radio" id="color_id" name="color_id" value="<%=color_id
%>" /><%=color.rgb_value%>