Choosing custom colors for tasks and projects in GanttPRO's interface

We have our own color-coding system in the company that we use across a variety of tools, the only missing one is GanttPRO. We assign specific colors to different stages of work like blue for design, orange for production, green for quality checks etc. Missing those colors in the software is a real big deal. It doesn't seem like a very difficult feature to add, so we'd be glad if your team consider making it part of the functionality.