Thanks again, for your fast answer. Unfortunately your idea does not solve my problem, that is the same thing than before. This process does only change the colors in the data table but not the color of the "cluster bubble graph". I want to change for example the bubble from cluster 1 from red to green in this plot and not the color of the dots. Maybe with the picture my question is a bit clearer .
9189_Screen Shot 2015-07-06 at 23.40.17.png
By doing the steps you have suggested the results are pictured below. You can easily see, that only the shape of the data points has changed but not the color of the clusters...
9190_Screen Shot 2015-07-07 at 00.19.47.png