Green arrows in recipes

If the arrow in the production/consumption recipes was green then it would clearly delineate input from output. Sometimes when I am laying down ghosts and clicking on them to make sure I have then in the proper order, according to their recipes, I lose track of what is inputting/out putting. Or maybe I should stop playing until 3am?

I think green arrows shown on the recipes in the assembly buildings, and also on the global recipes dialog would be helpful.