[rules-users] [designer] problem with color theme selection

I'm using Guvnor 4.3.Final with Designer 2.2.Final. I have to say that Designer is getting amazing each version. Congratulations and thanks the team for that !!! But I didn't like the default color because I can't read well the black text in a dark gray background color. So when I try to test the color theme and select the jBPM theme button I got this message: " invalid color theme data". what this mean ? How can I create my own color theme ? regards, Cristiano