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Customize Your Own WordPress Theme

An increasing number of businesses and website owners are using blogs as a means of communication with their customers and website visitors. If your business already has a website it is possible to have a blog that matches the look and feel of your existing website without doing a complete re-design and without paying thousands of dollars to have the blog developed. Using WordPress you can tailor an already existing blog theme to seamlessly flow with the rest of your website.

Why is it important to have a blog that matches the rest of your website?

1 – Maintaining the same design throughout your website will help to give your visitors a consistent experience and message while on your site.

2 – A more professional look can be accomplished by creating a customized theme that matches the rest of the site.

3 – By maintaining a consistent design throughout the site you will allow visitors to focus on the content of your blog rather than focusing on the design and layout changes.

4 – Many WordPress themes are used by hundreds or thousands of websites, whereas your custom them will be unique to your business.

5 – Using a blog layout that does not flow with the rest of your site may confuse visitors into thinking that they have left your site.

Understanding WordPress Themes

Editing and customizing WordPress themes can be very intimidating if you are not familiar with how they work. Essentially, when you are viewing a post on a WordPress blog you are seeing a combination of several different files within the theme. WordPress uses what they call The Loop, a php function that determines what the visitor is looking for and what should be displayed on the screen.

Although the WordPress system is very dependent on php, editing a theme does not require php knowledge. The php portion of coding is contained in easily recognizable portions of code. The html around the php can be changed to customize your theme to your website without changing the php coding. I will not be getting into the details of The Loop in this post, so please see the WordPress Codex if you need information and documentation on The Loop.

As mentioned above, WordPress uses separate files for different sections of the blog page. The header (portion of the page located above the blog post) comes from the header.php file. The blog post (or posts, if you are looking at a homepage or a category page) comes from the MySQL database. Most themes contain a sidebar.php file that appears next to the blog post, either to the left or the right. And the footer.php file contains the information that appears below the post and the sidebar.

Together the header, sidebar and footer files form a template that is applied to every page (although some themes are set to not show the sidebar in certain situations). Because of the template-like structure, any changes that you make to header.php, sidebar.php and footer.php will be reflected on all of your pages. This makes the customization easier as you really only have to customize the template.

Throughout this article we will be looking at a sample blog that I customized for a client from the Kubrick theme. The customization was done to match their existing website. This picture shows which parts of the page are in each of the WordPress files.

Breakdown of a WP theme
Once you understand how these files come together to display in the browser, all you will need to do is adapt the design to match your existing website.

Installing WordPress

If you haven’t already installed WordPress you can do so at For this website we use Host Gator (affiliate link), which provides an easier WordPress installation.

WordPress comes with two themes, Default (also known as Kubrick) and Classic. The Kubrick theme is a good starting block if you are creating or customizing your own theme. It is a fairly simple theme with clean and valid coding that has been used by thousands of bloggers. Almost any problem that could possibly occur with Kubrick has already been found and corrected.

However, if your existing website has a more unique design you may want to look for a theme that more closely resembles your layout, which can make the customization easier. You can find a gallery of free themes at

Breaking Down Your Existing Design

Since we know that WordPress sees the layout as a combination of a header, a body (blog posts), a sidebar and a footer, visualizing your existing website in the same sections will make the customization possible.

To start, take a page on your site that you want your blog to match and remove the content of the page. Leave the structure of the design and any images and navigation menus that you want to use on your blog. The blank space where you removed the content is where your blog posts will go. Anything above that will need to be included in the header.php file. For example, the header.php file of our blog theme includes the navigation menus and everything above. The picture below shows the portion of the design that is contained in header.php.

Our Header

Note: This is an older post and the design has since changed. The concept, however, remains the same.

If you’re working with Kubrick, the header.php file also contains the CSS code for the page’s background image. Most likely you will want to replace Kubrick’s background image with your own.

Chances are your existing website already has some type of sidebar. The sidebar may contain your primary navigation, text links to various pages, an email sign up form, or just about anything. Some of these things in your existing sidebar you will want to include in your blog sidebar. The blog sidebar by default includes a search box, links to pages that categorize your blog posts, a blogroll (links to other blogs), and some metadata that includes your login link.

To add content to your sidebar, open sidebar.php. If you are working with the default Kubrick theme your sidebar consists primarily of html code for an unordered list and php code. The php coding is used to generate links to your categories and archive pages. Any html that you want to add can be added in the sidebar, but it should not be placed inside php code.

For example, in our blog theme we added a form that allows visitors to sign up to receive our blog feed by email (a service that is provided by FeedBurner). In this case we simply inserted the code for the form, which was provided by FeedBurner, at the bottom of the sidebar. Editing your sidebar is pretty straightforward as long as you make sure that the html coding you add is valid and does not interfere with what is already there.

You can also remove any of the items in the sidebar that you do not want. If you don’t want to have a search box, remove the small piece of php coding that includes searchform.php. For our theme we chose to remove the blogroll.

The footer is edited in much the same way. The footer.php file for the Kubrick theme contains very little coding. The php coding that is in footer.php is only there to gather the name of your blog and to provide a link to your RSS feed. This coding can be removed if you like and any html that you wish to use for your footer can be entered here.

Editing the Style Sheet

Every WordPress theme includes a CSS file, style.css. This file controls the look of the entire theme. Most of the changes you will be making to customize your theme will be done to style.css.

The style sheet for Kubrick is very user-friendly when you’re trying to customize the theme. It is broken down into the following categories:

– Typography and colors
– Structure
– Headers
– Images
– Lists
– Form elements
– Comments
– Sidebar
– Calendar
– Various tags and classes

With this type of organization it is easy to find what you are looking for in order to make changes.

Editing the styles to create your custom theme will take some experimentation, so it is best to create a test area where you can make mistakes and not affect anything. If you already have an existing blog do not attempt to make changes to a theme while it is currently selected as your blog theme. My recommendation is to install a WordPress blog in a folder on your site that is strictly for testing purposes. This way you can make changes to the style sheet and php files, update them to see how you theme looks, and not have to worry about causing any problems with your existing blog.

The CSS file for a WordPress theme works the same way as any other CSS file. Where you could run in to problems is in the naming of the divs and classes. Most likely when you are customizing a theme you will be leaving some of the structure in place, and you will be adding some of your own. For example, the header.php file for Kubrick contains a header div and a header image div. When you are customizing the header to add what you want you can either use the existing structure, or you can create your own. If you use the existing structure, anything in the header div will still be styled under the existing CSS file until you change the CSS to meet your needs.

In our example site everything we added to the header file, picture, navigation and search box, are all contained within the header div. To customize the header.php file we then changed the height and width of the header div to meet our needs, as well as changing the background image and color. If you’re used to working with CSS this process is not too difficult. Everything you see in the picture below is in the header.php file.

Blog header

The key to customizing the theme is breaking it down into pieces – header, sidebar, post area, and footer. Work on one piece at a time with the appropriate file and the CSS file. Once each piece is completed you will have you own customized WordPress theme.

Looking for hosting? WPEngine offers secure managed WordPress hosting. You’ll get expert WordPress support, automatic backups, and caching for fast page loads.

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