When changing background colour background of textarea does not remain white

[KenT2]

I changed the colour of main window and dialog by editing the div element in styles.css

div { background-color: LightGray; z-index: 0; }

To correct the text area colour which also turned grey I needed to add background-color: white;

to the .TextInput entry

There may be other areas that should remain white, I cannot tell as I do not know what the colour policy is.

[KenT2]

I have identified that the background of the File Selection Box entries should be white. Unfortunately my CSS is not good enough to correct this as that element does not seem to have a CSS entry.