In relation to TIE fighter colours. This is the EFX model apparently scanned from a screen used TIE righter and is the colour of the screen used model. I remember reading something about people having a conversation about whether they should be blue or grey. The above picture is what the model was the film and or after effects may of changed it. Hopefully this picture is accurate in original colour and could be used.

I don't know what lighting this picture was taken but I guess it was lit up for publicity shots for EFX.