Conditional Formatting on Shape Maps

Hi!

I am trying to conditional format the shapes of a shape map depending on 4 different values I obtain from a measure I have already created.  Depending on these values i want the shape to be (green, blue, yellow or red).  

The results of this measure will also depend on the selected values of different slicers in my report. Therefore I can not create a calculated column either select diferent colors for each value in the formatting pane.

Any ideas how to solve this puzzle? Thank you!