I have had a look, using LC Designer ES it is possible to set the colour of the value portion of the view to grey by accessing the Object / Field / Appearance / Custom and setting the background fill to solid (and picking a colour).
If you are using an earlier version, then setting the background to white (which might set the whole field to white). Then in the initialise event:
Can't remember exactly 😉 I know that the "fld" variable is not how I name variables, so I am guessing that I got the solution from this forum. Once I was put onto it, I got the other user interface definitions from the Abobe Calculations and Scripts file.
I also use JP Terry's book and Adobe reference documents.