Hi Guys, i am working on a translation app. There are a couple of regular input fields with text that the user is supposed to change to a new language.  I want to change the color of the input field  as soon as the user leaves the input field. Is there a way to do that?  I know how to do this with a button, but i don't know how i can work with focus. Has any of you done something like this before?   Thanks!