In Win3 era you will see a representation of what your new color theme will look like. Also, you can do something similar to what happens when you change scree

In Win3 era you will see a representation of what your new color theme will look like. Also, you can do something similar to what happens when you change screen resolution. A window pops up with a countdown for let's say 60 seconds (or more), and if you don't press ACCEPT before it reaches 0, it undoes the changes.