So I've bought brown bigger bags, but now I want some of different colours. I wish I could change their colour - maybe at some small expense of fruit (different colours to select the new bag colour) and compounds (to 'fix' the new colour).
The cost should really be nominal though as the bag colour provides no difference in its value.
Say for example - the black bag requires grapes and Diabolic Acid, the pink bag requires strawberries and Rubemycin, etc. Small bags only require x of each to complete the change, Bigger bags require 2x (where x is any small number).