Three Logos

I created three logos, one with a background for the favicon, and two transparent (one big and one small) for the header and the default featured image.

Favicon

As per this article, I added the logo in the head HTML tag. To do this, following this way of working with the theme, I worked on the file /_includes/head.html. The code I added is as follows:

<link rel="icon" type="image/x-icon" href="/assets/logo35.png">

I followed this example solution.

As per this previous post, I updated the old default featured image.