I changed the look of the signs for all the production buildings (TMR, silage, seed, fertilizer, hay). I translated them in English. Nothing too fancy but in my opinion the blue signs don’t match with those nice buildings.
Just substitute the file with the same name in the texture folder for each mod.
I also reduced my signs by half, but I don’t want to reupload mods made by others, so if you want to you can change it by yourself using Giants editor (quite the easy task).