Is there such a thing as soft brass colored solder

Stained glass stores sell "patina". These are chemical washes that will turn your solder the desired color. They also sell lead-free solder for making stained glass pieces to be used around food.

You may need to ask if the patina is compatible with the solder.

Danny,

I don't think that there is a brass colored solder, as such, but you might want to look into a copper patina used by stainded glass craftsman.

It's used to color the 50/50 lead solder user to assemble glass pieces with the copper foil method. I don't have any idea if it would work with not-lead solders.

The copper patina liquid is simply rubbed on and then buffed down a bit.

You might also have a look at:

-=- Steven