Step by step to Centre a Blog Logo on Blogspot.

Blogger enables clients to utilize a header picture or logo rather than blog title and portrayal however as a matter of course, any picture you transfer to use as the header picture or logo adjusts by left and won't show up in the middle as a matter of course aside from if the picture is same width as the blog header.

Blogspot aligns the header in your business blog to the left by default. Many Blogspot themes stretch header images across your blog's whole width, so this alignment rarely affects your blog's appearance.

How to Make Logo Appear In Center of Blogger Header.

Sign in to your Blogger blog dashboard

Go to "Template"

Click "Customize"

Click "Advanced"

From the Advanced options, click "Add CSS"

Then, copy and paste the code below in the box :

#header-inner img {margin: 0 auto !important;}
#header-inner {text-align:center !important;}

Click "Apply to Blog"

I believe the logo has been centered as you have visioned.

Happy blogging.