I'm sorry if I offended you I do not know much about ships and I thought the tip would be the door for the boxes and the main door for the crews.
And about the main doors (of course this silver one on the center
) I think it should have lights like you know. In night you need to deliver a really important package and you need to see door, about a shading use darker Orange (use 4 or 5 shades or orange test it)