I am having a hard time finding navy coloring. any suggestions.thanks

I use Americolor navy with a touch of black, anyone's for a real navy. I bought a huge bottle of it cause navy is hard to find around me.

I make my icing as blue as I can. Then I frequently add a tube or two of Wilton ready to use blue squeeze icing (It is found almost everywhere.) to my homemade icing. Then let it all sit overnight to see how dark it gets. I do this for red and black as well.

I got a really nice navy just mixing Wilton Royal Blue and Black. You just keep adding a bit of both until you get the right shade (I added more blue than black)

Sky blue + violet will produce 2 colors, periwinkle if you blend just a tiny bit into white, navy if you add a lot more. HTH

I also use Wilton Royal Blue (and plenty of it) with a touch of black.