Voyager

As here:
http://www.hobbytalk.com/bbs1/forumdisplay.php?forumid=15
It's whwre all us Trek modeling geeks hang out.

and search Cult's site for a Voyager how-to. Not sure if he has one, but there's a good chance:
http://www.culttvman.com/

The short answer is "overall deck blue" whatever that means :)

Try going to Pcmodeler they have some pics there also.

I think your best bet would be to check out some of the fan sites that have film clips posted to them for use as wall paper on your PC.One I use for a back ground wallpaper is at http://stinsv.com/voy.htm they got just about all you could want. That link will take you to the voyager page but they got everything for TOS to all the Movies. Many have high quality pics that would help with the best match. As for color codes I personal don't know but I'm sure that theres a place that can give'em to you. Good luck!