Customize Your Blogger Theme with HTML and CSS
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If you are a blogger but don't know how to design your template, then this post is for you. This step-by-step guide shows how to edit your theme using HTML and CSS. Every reader will learn how to personalize colors, fonts, layout, and more.
1. Enable Advanced Theme Editing
- Go to Blogger Dashboard → Theme → Edit HTML.
- Click "Expand Widget Templates" to see full structure.
- Always backup your current theme before editing!
Backup tool is at Theme → Backup/Restore.
2. Change Background or Body Font
Note:
Remember that this post will only teach basic design, meaning more code will be given. If you want something specific, comment and I will write a new post about it.
Search for <body> tag in your HTML. Example:
<body expr:class='…'>
Add inline CSS:
<body style="background:#f2f2f2; font-family:Arial,sans-serif;">
Want to keep it in CSS? At top, add:
<style>
body { background: #f2f2f2; font-family: Arial, sans-serif; }
</style>
3. Customize Header Logo Size
Search for your Logo or Blogtitle code block:
<b:if cond='data:blog.logoUrl'>
Add this CSS:
.header-logo img {
width: 200px;
max-width: 100%;
height: auto;
}
If header-logo class isn’t present, wrap the image tag manually:
<div class="header-logo"> <img src="URL" alt="Blog Logo"> </div>
4. Style Blog Post Titles
Find post title CSS or HTML:
.post-title a {
color: #2e3b4e;
font-size: 2em;
text-decoration: none;
}
Users should easily spot post headings now.
5. Adjust Layout: Sidebar and Main Content
To control layout widths:
.main-wrapper { display: flex; }
.main-content { flex: 3; padding: 10px; }
.sidebar { flex: 1; padding: 10px; background:#f9f9f9; }
This creates a two-column layout, ideal for blogs with sidebar tools or links.
6. Customize CSS via Blogger Dashboard
Instead of editing HTML, use:
- Blogger → Theme → Customize → Advanced → Add CSS
- Paste CSS there, then hit Apply.
7. Example: Make Blockquotes Stand Out
Blockquotes add emphasis. Use CSS:
blockquote {
background: #fff9c4;
border-left: 4px solid #ffd54f;
padding: 10px 15px;
}
Readers will notice highlighted tips instantly.
8. Test Mobile Responsiveness
After editing, click Preview in Blogger. Then test on phone. Ensure text, images, sidebar wrap properly.
Ensuring your website looks fantastic and functions flawlessly on every device is crucial for a great user experience and boosting your search engine rankings. To test mobile responsiveness, you'll want to combine a few smart strategies: start by using Google's free Mobile-Friendly Test tool for a quick assessment, then leverage your browser's built-in developer tools (like Chrome's DevTools with its device toolbar) to simulate various screen sizes and orientations. Don't forget the ultimate test: checking your site on actual physical mobile devices! This blend of tools and real-world testing ensures your website is truly adaptable, providing a seamless experience for all your visitors, no matter how they access your content, which is key for SEO success and happy users.
FAQ for Customizing Themes
Can I revert changes?
Yes, always backup before changes. You can re-upload the backup.
Where to add CSS?
Use the “Advanced → Add CSS” section in the Blogger theme designer.
Final Summary
Follow these steps to edit your Blogger theme with HTML and CSS:
- Backup theme first
- Edit body, header, titles for styles
- Use CSS panel for tweaks
- Preview and mobile‑test changes
These examples will help customize fonts, colors, layout and more. Try one step at a time and see your blog transform.
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