conditional formatting across multiple measures

I have multiple measures in a matrix. I would like to color-code them as a group as opposed to each measure separately... for example, it one measure had values -20,20,30 and the other had 10,-5, and 100, I want to color code (or bar chart) the group to the MIN of the combined group (-20 from the first measure) and the MAX of the combined group (100 from the second measure)