NVGs are least sensitive to blue light, which is why blue is the color of choice for in-vehicle lighting these days, rather than red. You're far less likely to burn a tube with blue lights.
That being said, I've never seen an EoTech with a blue reticle, and any advanced NV capable Eotech I've ever seen uses red and has low-power settings (invisible to the naked eye) specifically for use with NVGs.
I'd stick with red if I were you, just be sure to get a "NV" model. Camille at Mod Armory can help you out.