"Duck Egg Blue" should actually be named "Easter Egg Blue". I bought some for a build only because it was on the list....and I've yet to open the bottle and probably never will.
Since you are doing an Enterprise Refit, I'd highly recommend visiting this site:
scifimodelaction.com/.../index.php
You'll need to look around for all of the Refit posts, but there are tons to look through. Unfortunately, I'm probably opening a can of worms here for you. One visit to the site and I was hooked. I have a TOS Enterprise sitting on deck as my next build (full lighting) and can't imagine doing it without consulting this site.
If you have the time, go to YouTube and type in "Trekworks" into the search feature. This is the channel for the guy who started the website. He has a ton of builds on his channel, from Refits to Lost In Space kits.....basically anything SciFi. You'll get a good idea about what colors he, and just about everyone else uses. His Aztec details are nothing short of amazing.
I've not seen "Duck Egg Blue" being used. I think most everyone uses a shade of gray.
Go check out these sites. You'll probably change your approach a dozen times before you settle on what works.
Have fun.....
Matt