tgrk

Using Custom Logo you can replace WP default login/register page logo by placing URL to custom logo 
you have (in proper size of course ;)). It is done using JavaScript onload event. It is not ideal, because 
there is small delay. I will try to improve it as soon as possible(I created it because of need for one small 
project…). Reason for using approach is seamless WP upgrades without any need for backup wp-admin.css or 
changed wordpress-logo.png.

Custom Logo

Replace WordPress default login/register page logo with custom one.

Muhammad Alnajlat

Light, fast and easy-to-use plugin for branding WordPress login page by setting your brand logo and theme color and extra simple styles.
What you can do with Brand My Login:
<ul>
<li>The simplest things you need to brand your login page.</li>
</ul>

Brand My Login

Brand and style your WordPress login page quickly and lightly.

Custom Logo vs Brand My Login