about TPaveStat

Dear all,     

       In the attchaed figure,I want to change the color of object into white with command like below:

           TPaveStats *ptstats = newTPaveStats(0.7,0.8,0.9,0.9,"blNDC");
           ptstats->SetFillColor(10);
      the default color is 19, but it doesn't work if I change 10,I find the
class TPaveStat herits from the TPaveText...TAttFill,It shoulde do,but not,why?
      
     Thanks in advance!

with best wishes,
Fengrong Zhu
Institute of High Energy Physics,
C.A.S P.R.C
zhufr_at_ihep.ac.cn
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