I just start making map two days ago, the software I use is AutoRealm.
It was quite easy to grasp the basic, but now I'm having problem with coloring the map. I can't find the option of some sort anywhere, can anyone point it out to me? The object can only have one color at a time and its impossible to differentiate between deep/shallow water, or higher/lower ground level. At the moment I'm settling with black and white.

Here's the map I'm talking about.


Thanks in advance