Color palette for values of a field above threshold in JRS 6.0.2

I've created a report to indicate project schedule variances against timeline in JRS. Obviously there were a lot of formulas and calculations involved so I had to switch to manually editing the JRS query. The requirement here is to indicate project variance above 50% in red colors and below 50% in some other color. Project Schedule Variance is a custom calculated field. Is there a way in JRS 6.0.2 that this can be achieved? Any help in this regard would be highly appreciated. 

P.S I am aware that we can change colors for rows and columns, this requirement is about different colors depending on the results.