So you think some would come out blue? Or do you mean like a splash with blue in it?
No they will all be basically blue reds / blue partridge . If he is truly splash blue red / blue partridge as the larger picture seems to confirm . Blue genetics apply in this case . Splash blue partridge x normal ( black partridge ) partridge = 100% blue partridge . Since these are EE recessive color genes may be hidden and pop up . This is as good as it gets for predicting EE colors .