I agree with your suggestion that the sashing is overpowering for your quilt. Perhaps you could cut the sashing in half and use it to frame strips made out of the same material as the tan colour in your baskets? It means your 3 strips will have to be cut so they come to the same measurement as your present sashing (or change the measurement if you desire). However, making less of the orange so that it is an accent and not dominating, should do the trick. Please give us a look at the finished result.