But, back from Deer.....short answer (after many posts) is that Blue will be much more visible, due to the sensitivity of your cones to that wavelength, but Red will cause less ruin of nightvision because it barely affects the cones (which take over in low-light condition..hence color loss as it darkens). Red will be more comfortable, but blue will actually allow you to see further, which is the opposite in bright light conditions. Depends whether the rod or cones are in charge. Day/Night.
So..there's that.
If you have an LED lamp, you can buy a red LED cheaply, and if you have a standard lamp, you can put a color in the head of the case. An earlier post pointed out that you can get a free "swatchbook" from a gel (color sheet) manufacturer. Great Idea. You'll be able to cut up any color you want..depending on the company they'll have 50-150 colors depending on which book they send you. I prefer Gam.com for Blues, and Rosco.com for reds, but it probably won't matter.
FM