Hi Robin

Do it on your grid init method

*** grid init
this.Column1.DynamicBackColor = "ICASE(EMPTY(wipdata.wup1),rgb(255,255,255),!EMPTY(wipdata.wup1) and wipdata.mat_type!='Blend',RGB(0,255,0),!EMPTY(wipdata.wup1) and wipdata.mat_type='Blend',RGB(255,100,0),rgb(255,255,255))"


Best regards,
Ony