Most of these in my area are black or brown, some are olive and a few are orange. I've seen one that was maple-leaf red. I went back to the area, couldn't find the red type, so I collected the orangest of the orange, and will try to isolate this 'red' expression. I have about seven specimens. Is there anything different about slug genes than fish genes? Should I force the reddest individuals to self-fertilize and cross the reddest offspring of these self-fertilized batches, or let them cross at will and just remove the darker offspring? What about crossing back the offspring with the parents?
). You have very good chances of sucsseding in your project and DONT kill anything of what your doing Im SHURE there is both interest and a market for your product, and yes there is a growing number of people that keep pet slugs, they would drool at your owesame ones. Here is the site: 
Now my sugestions. 2 slugs are a start but you defenetly need a larger gene pool, try to put together at least like 6 of the coolest ones you can find. If you cant find especimens of so intense coloration still use them and then sellect the best looking offspring at each breeding. Now dont forget it may take some time for baby slugs to develop their full color. Its the photo the setup you have for them? Because its inadequate, you need a ruber container with very small numerous holes on the top, moist dead leaf litler, a chunk of cork and a moist substrate several inches tick (moist peat and sand) for the slugs to burrow and lay their eggs. Ad some wood lice to keep molts and waste in control. Feed them with washed fruit and vegetable left overs and mushrooms. I recomend dont removing the eggs. 