OK, it sounds like you are brand new to the Montezuma theme, so here is some background information that you will find helpful.
Like all themes, the main CSS rules are stored in a file called style.css. However, in the case of Montezuma, and unlike just about every other theme out there, the style.css file is created somewhat dynamically whenever a change is made to the virtual CSS files.
The virtual CSS files can be found by going to Appearances > Montezuma Options > CSS Files from the WordPress Dashboard. They are referred to as virtual CSS files because they aren’t physical files, but settings which are stored in a database table. That way, if the theme ever gets updated, you won’t lose your CSS settings.
You’ll see files like content.css, which is the baseline CSS for the site, menus.css & menus_menu1.css files for changing the appearance of menus, one for widgets, etc. Any miscellaneous CSS goes in the various.css file. Unfortunately, it can be somewhat challenging to figure out which virtual file has the CSS rule that you want to change. I submitted a feature suggestion to the theme developer to have comment headings output in the style.css file to make them easier to find.
So to change the page color of your site, go to the content.css file, scroll down and you’ll see a rule for the body element that looks like this:
body {
margin: 0;
padding: 0;
font-family: "Segoe UI", "Lucida Grande", "Helvetica Neue", sans-serif;
font-size: 15px;
opacity: 0; /* <--- will be turned on ( = set to '1' ) with jQuery
after google fonts, if any, have loaded and masonry layout,
if any, was applied */
}
Just add a background-color property like this:
body {
margin: 0;
padding: 0;
font-family: "Segoe UI", "Lucida Grande", "Helvetica Neue", sans-serif;
font-size: 15px;
opacity: 0; /* <--- will be turned on ( = set to '1' ) with jQuery
after google fonts, if any, have loaded and masonry layout,
if any, was applied */
background-color: #ff0; /* Yellow */
}
And you’ll have changed the page color.
Once you get comfortable with manipulating the virtual CSS files, you’ll want to read up on how to use the virtual Main and Sub Templates (Appearances > Montezuma Options > Main Templates). The virtual templates allow you to manipulate the appearance of your web site to a greater degree. For example, you can add a sidebar to the left, move the menu to the top, add widget areas to the header or footer, create custom layouts for certain pages, etc.