Personally, I think I would do the 2" dark purple border on the sides, then a 5" scrappy piano key type border just on the sides, then a 2" dark purple border just on the sides, a 3 1/2" light purple or dark pink sides border, then a dark 2" border all the way around. Then bind in the dark. This would give you a quilt that is 74 x 93 and much more proportional in dimension.