Hi there!

I wanted to create my own Login Screen and I made it so far! :)
But there's a little thing I'd like to change. After hitting the Windows Key+L there's a a screen with the default windows blue of the login screen until the login screen itself appears.
Is there any chance to get rid of this?

I got a second question as well:
When I start the computer I get a DE with blue background next to the password field, but when I'm logged in and just want to change the user, it isn't there. Anyone knows how to fully disable it?